Skip Navigation

2007 HCUP Nationwide Inpatient Sample (NIS) Comparison Report


HCUP Methods Series 2007 HCUP Nationwide Inpatient Sample (NIS) Comparison Report

Report #2010-03

Contact Information:


Healthcare Cost and Utilization Project (HCUP)
Agency for Healthcare Research and Quality
http://www.hcup-us.ahrq.gov


For Technical Assistance with HCUP Products:

Email: hcup@ahrq.gov

or

Phone: 1-866-290-HCUP


Recommended Citation: Barret M, Wilson E, Whalen D. Summary 2007 HCUP Nationwide Inpatient Sample (NIS) Comparison Report. HCUP Method Series Report # 2010-03. Online September 9, 2010. U.S. Agency for Healthcare Research and Quality.
Available: http://www.hcup-us.ahrq.gov/reports/methods/methods_topic.jsp



TABLE OF CONTENTS

INDEX OF TABLES

INDEX OF FIGURES 


INTRODUCTION

This report provides a summary of analyses that compare estimates from the HCUP Nationwide Inpatient Sample (NIS) for 2007 to three related data sources: the American Hospital Association (AHA) Annual Survey Database, the National Hospital Discharge Survey (NHDS) from the National Center for Health Statistics, and the MedPAR inpatient data from the Centers for Medicare and Medicaid Services (CMS). For full information on these databases and complete details on prior years’ findings, refer to earlier versions of this report on HCUP-US Website under the heading "NIS Comparison Reports" at http://www.hcup-us.ahrq.gov/db/nation/nis/nisrelatedreports.jsp.

As shown in Figure 1 and Table 1, the 2007 NIS is selected from a sampling frame comprising 40 HCUP Partner organizations.

 

Figure 1. HCUP State Partners Participating in the NIS, 2007 (text version)

Figure 1: Map of states participating in the 2007 NIS

The findings in this report are summarized in tables that highlight differences and similarities between the four databases.

Based on the analyses presented in this report, the NIS appears to provide reliable national estimates when compared with other national data sources along the dimensions of hospital characteristics, numbers of discharges, length of stay, and in-hospital mortality.

Each of the data sources discussed has its strengths and weaknesses, and each may be the preferred choice for different research questions. The NIS offers a large sample that enables study of low incidence disorders and less common procedures; NIS estimates can be calculated for literally thousands of sub-populations that may be of interest to researchers. In addition, NIS hospitals accurately reflect the universe of United States hospitals, particularly the relative mix of large and small hospitals. Therefore, the NIS may be more appropriate when hospital type and size are important considerations.

In contrast, the NHDS and MedPAR both offer data drawn from all 50 states, rather than the more limited sampling frame of the NIS. Where a comprehensive geographic representation is more important than a large sample size, these resources might be preferable. Alternatively, if the question under study applies only to Medicare enrollees, the MedPAR data set might be favored.

Which of the data sources is better? The answer depends on the needs of the researcher. The intended use of the data is the most critical factor in determining which data source will be most valuable. In general, the NIS estimates of data elements essential to healthcare policy – including in-hospital mortality, inpatient population size, length of stay, and charges – are accurate and precise. It is possible to calculate statistics for large groups ranging from the inpatient population of the United States, as well as for small subsets focusing on specific conditions. The characteristics documented in this report suggest that the NIS produces reliable estimates and that it is a valuable tool for researchers and policy makers alike.

 

Table 1. Comparison of States in the NIS with National Demographics, 2007
  NIS Sampling Frame United States
Number of States 40 50 plus District of Columbia
Population 269,763,460 301,621,157
Sampling frame for the NIS includes: 78% of U.S. community hospitals 100%
81% of community hospital discharges 100%
90% of U.S. population 100%
Average population density (persons per square mile) 114.7 84.5
Population density for the least populated states (persons per square mile) Nebraska (23.1)
South Dakota (10.5)
Wyoming (5.4)
Montana (6.6)
Wyoming (5.4)
Alaska (1.2)
Market penetration of Medicare managed care providers 18.4% 19.0%

 

Return to Contents

 

Summary of NIS-AHA Comparisons

Table 2. Number of Hospitals in NIS Frame1 and AHA Universe, 2007
  NIS (weighted) NIS (Unweighted) AHA
Region
Northeast 651 134 651
Midwest 1,487 302 1,487
South 2,032 416 2,032
West 929 192 929
Hospital Control
Public 1,105 228 1,120
Non-Profit 3,003 614 2,918
Proprietary 991 202 1,061
Location / Teaching Status
Rural 2,050 420 2,050
Small 1,030 209 1,323
Medium 425 88 401
Large 595 123 326
Urban, non-teaching 2,205 450 2,205
Small 1,014 206 1,032
Medium 554 114 593
Large 637 130 580
Urban, teaching 844 174 844
Small 255 53 245
Medium 256 52 241
Large 333 69 358

Note: Significance tests were not performed because AHA numbers are not sample statistics.
1 The 2007 frame contains 40 states.

 

Table 3. NIS and AHA Comparisons by Facility Services, 2007
  NIS AHA
High Tech Index1 (mean) 2.66 2.58
High Tech Index1 (median) 2.00 2.00
Neonatal ICUs2 18.89% 18.61%
Cardiac Catheterization2 27.35% 26.64%
CT Scanners2 78.45% 74.87%
MRIs2 57.25% 54.83%
Open Heart Surgeries2 20.81% 21.58%
Transplant Services2 7.25% 7.76%
Intensity Modulated Ray Radiation Therapy2 19.93% 18.32%
Extracorporeal Shock Wave Lithotripsy2 22.32% 21.89%
PET Scanners2 13.52% 13.09%
Pediatric Specialty Hospitals 1.06% 1.70%
Burn Units 3.83% 4.38%
Rehabilitation Units 25.30% 24.64%
Alcohol/Chemical Dependancy Services 8.93% 7.13%
Trauma Centers 28.31% 28.97%
Emergency Departments 78.95% 76.28%

Note: Significance tests were not performed because AHA numbers are not sample statistics.
1Prior to 2004, the index included Angioplasty services.
22High technology service - used in the "High Tech Index."

 

Table 4. NIS and AHA Comparisons by Facility Characteristics, 2007
  NIS Mean AHA Mean NIS Median AHA Median
Hospital Admissions 7,143.42 6,902.30 3,290.00 3,154.00
Hospital Discharges 7,143.42 6,902.30 3,290.00 3,154.00
Hospital Discharges1 8,037.53 7,687.40 3,612.00 3,494.00
Average Length of Stay 5.74 5.89 4.31 4.38
Average Length of Stay1 5.33 5.49 3.92 4.00
Births 894.11 785.10 310.00 248.00
Percent Medicare Days 54.07 54.51 54.31 55.66
Percent Medicare Discharges 49.16 48.76 47.87 47.95
Percent Medicare Discharges1 45.62 45.42 43.38 43.67
Percent Medicaid Days 15.05 14.54 13.15 12.52
Percent Medicaid Discharges 16.18 15.68 15.93 15.08
Percent Medicaid Discharges1 14.51 14.15 14.04 13.54
Hospital Beds 149.18 146.11 82.00 80.00
Occupancy Rate 52.34 52.23 54.19 53.73
Inpatient Surgeries 2,014.30 2,040.69 896.00 892.00
FTE2 926.88 874.98 405.50 396.00
FTE2 per Bed 6.06 5.76 5.43 5.22
RN FTE2 per 1000 Patient Days 3.93 3.52 3.16 3.09
Intern-Resident FTE2 per 100 Beds 6.77 6.40 0.00 0.00
Intern-Resident FTE2 per 100 Beds (Teaching Hospitals) 34.81 34.60 11.61 12.08
Total Hospital Expenses $122,366,800 $112,658,940 $51,407,783 $45,143,250
Hosp. Expenses per Bed $751,718 $690,442 $651,770 $621,871
Total Hospital Payroll $49,681,561 $45,406,010 $20,051,934 $18,110,986
Hosp. Payroll per Bed $301,262 $276,596 $256,525 $245,781

Note: Significance tests were not performed because AHA numbers are not sample statistics.
1 To be consistent with the other datasets used for analysis in this report, AHA Annual Survey admission counts have been adjusted by including admission counts for well newborns.
2 Full-time equivalents.

 

Return to Contents

 

Table 5. NIS and AHA Comparisons by Region, 2007
  Number of Discharges in Thousands (Standard Error) Average Length of Stay in Days (Standard Error)
NIS AHA NIS AHA
Overall 39,541 (799) 40,023 4.60 (0.03) 4.46**
Region
Northeast 7,753 (337) 7,753 5.13 (0.08) 5.04
South 9,130 (323) 9,130 4.35 (0.06) 4.26
Midwest 15,273 (594) 15,273 4.62 (0.06) 4.47*
West 7,385 (258) 7,385 4.33 (0.08) 4.06**

*Significant at p<0.05.
**Significant at p<0.01.

 

Table 6. NIS and AHA Comparisons by Hospital Control, 2007
  Number of Discharges in Thousands (Standard Error) Average Length of Stay in Days (Standard Error)
NIS AHA NIS AHA
Total Public 5,667 (693) 5,542 4.86 (0.16) 4.7
1-99 Beds 1,041 (70) 1,060 3.89 (0.16) 3.79
100-199 Beds 826 (130) 923 4.05 (0.12) 4.23
200-299 Beds 645 (143) 633 4.16 (0.16) 4.28
300-499 Beds 848 (243) 1,241 4.99 (0.28) 4.96
500+ Beds 2,305 (383) 1,683 5.73 (0.27) 5.53
Total Private Non-Profit 28,600 (965) 28,587 4.54 (0.03) 4.40**
1-99 Beds 2,433 (129) 2,617 3.67 (0.07) 3.78
100-199 Beds 4,657 (295) 4,759 4.22 (0.06) 4.10
200-299 Beds 6,202 (482) 5,842 4.46 (0.06) 4.26**
300-499 Beds 9,596 (783) 8,265 4.76 (0.06) 4.42**
500+ Beds 5,710 (939) 7,103 4.91 (0.10) 4.94
Total Proprietary 5,274 (389) 5,411 4.65 (0.09) 4.49
1-99 Beds 936 (98) 1,007 4.64 (0.28) 4.88
100-199 Beds 1,530 (126) 1,622 4.44 (0.15) 4.16
200-299 Beds 1,217 (177) 1,233 4.51 (0.15) 4.41
300-499 Beds 1,138 (225) 1,011 4.91 (0.16) 4.61
500+ Beds 450 (162) 535 5.09 (0.26) 4.70

*Significant at p<0.05.
**Significant at p<0.01.

 

Table 7. NIS and AHA Comparisons by Location and Teaching Status, 2007
  Number of Discharges in Thousands (Standard Error) Average Length of Stay in Days (Standard Error)
NIS AHA NIS AHA
Rural 5,102 (218) 5,102 3.96 (0.06) 4.06
Small 1,259 (61) 1,300 3.61 (0.12) 3.68
Medium 1,116 (100) 1,316* 3.59 (0.06) 3.78**
Large 2,727 (246) 2,485 4.27 (0.09) 4.40
Urban, Non-teaching 16,417 (456) 16,417 4.45 (0.04) 4.27**
Small 1,923 (137) 1,922 4.33 (0.16) 4.42
Medium 4,661 (254) 4,566 4.27 (0.07) 4.02**
Large 9,831 (478) 9,928 4.56 (0.05) 4.36**
Urban, Teaching 18,021 (618) 18,021 4.92 (0.06) 4.75**
Small 2,802 (322) 2,432 4.48 (0.11) 4.40
Medium 4,886 (609) 4,621 4.95 (0.10) 4.67**
Large 10,332 (966) 10,967 5.03 (0.10) 4.86

*Significant at p<0.05.
**Significant at p<0.01.

 

Return to Contents

 

Summary of NIS-NHDS Comparisons

 

Table 8. NIS and NHDS Comparisons by Region, 2007
  Number of Discharges in Thousands (Standard Error) Average Length of Stay in Days (Standard Error) In-Hospital Mortality Rate Percent (Standard Error)
  NIS NHDS NIS NHDS NIS NHDS
Overall 39,541 (799) 38,416 (1,751) 4.58 (0.03) 4.67 (0.34) 1.93 (0.02) 1.92 (0.12)
Region
Northeast 7,753 (337) 8,063 (1,096) 5.11 (0.08) 5.561 (c) 2.13 (0.06) 1.891 (c)
South 9,130 (323) 8,565 (1,017) 4.33 (0.06) 4.141 (c) 1.76 (0.04) 1.991 (c)
Midwest 15,273 (594) 14,187 (786) 4.60 (0.06) 4.77 (0.41) 1.96 (0.05) 1.98 (0.15)
West 7,385 (258) 7,600 (567) 4.31 (0.08) 4.161 (c) 1.89 (0.06) 1.78 (0.18)

*Significant at p<0.05.
**Significant at p<0.01.
1A significance test was not performed because a valid standard error was not available.
(c) A valid standard error could not be calculated.

 

Table 9. NIS and NHDS Comparisons by Hospital Control, 2007
  Number of Discharges in Thousands (Standard Error) Average Length of Stay in Days (Standard Error) In-Hospital Mortality Rate Percent (Standard Error)
  NIS NHDS NIS NHDS NIS NHDS
Total Public 5,667 (693) 4,364 (202) 4.84 (0.16) 4.94 (0.36) 1.93 (0.07) 1.86 (0.12)
1-99 Beds 1,041 (70) 1,260* (61) 3.86 (0.16) 3.88 (0.29) 2.06 (0.07) 2.05 (0.14)
100-199 Beds 826 (130) 768 (38) 4.03 (0.12) 4.09 (0.31) 1.97 (0.13) 1.60* (0.11)
200-299 Beds 645 (143) 290* (16) 4.14 (0.16) 5.32* (0.44) 1.65 (0.23) 2.78** (0.22)
300-499 Beds 848 (243) 1,208 (58) 4.97 (0.27) 5.67 (0.42) 1.83 (0.13) 2.26* (0.15)
500+ Beds 2,305 (383) 835** (41) 5.71 (0.27) 6.11 (0.46) 1.96 (0.13) 0.93** (0.06)
Total Private Non-Profit 28,600 (965) 29,174 (1,331) 4.53 (0.03) 4.54 (0.33) 1.93 (0.03) 1.99 (0.12)
1-99 Beds 2,433 (129) 5,695** (262) 3.65 (0.07) 3.85 (0.28) 1.97 (0.06) 2.00 (0.13)
100-199 Beds 4,657 (295) 5,314 (245) 4.20 (0.07) 4.26 (0.31) 1.95 (0.06) 1.80 (0.11)
200-299 Beds 6,202 (482) 7,179 (330) 4.44 (0.06) 4.53 (0.33) 1.86 (0.05) 1.98 (0.12)
300-499 Beds 9,596 (783) 6,417** (295) 4.74 (0.06) 4.73 (0.34) 2.01 (0.07) 1.98 (0.12)
500+ Beds 5,710 (939) 4,567 (211) 4.90 (0.10) 5.46 (0.40) 1.81 (0.09) 2.26* (0.14)
Total Proprietary 5,274 (389) 4,877 (225) 4.63 (0.09) 5.25 (0.38) 1.97 (0.06) 1.55** (0.10)
1-99 Beds 936 (98) 1,183* (57) 4.61 (0.28) 6.91** (0.52) 2.13 (0.18) 0.89** (0.06)
100-199 Beds 1,530 (126) 2,284** (107) 4.42 (0.15) 4.78 (0.35) 1.95 (0.12) 1.55* (0.10)
200-299 Beds 1,217 (177) 635** (32) 4.49 (0.15) 4.84 (0.37) 2.01 (0.09) 2.40 (0.17)
300-499 Beds 1,138 (225) 665* (33) 4.90 (0.16) 4.44 (0.34) 1.82 (0.10) 2.04 (0.14)
500+ Beds 450 (162) 108* (7) 5.07 (0.25) 4.52 (0.45) 1.98 (0.24) 0.66** (0.06)

*Significant at p<0.05.
**Significant at p<0.01.

 

Table 10. NIS and NHDS Comparisons by Patient Characteristics, 2007
  Number of Discharges in Thousands (Standard Error) Average Length of Stay in Days (Standard Error) In-Hospital Mortality Rate Percent (Standard Error)
NIS NHDS NIS NHDS NIS NHDS
Age Group
0-15 Years 6,387 (241) 6,391 (294) 3.67 (0.07) 3.92 (0.28) 0.39 (0.02) 0.46 (0.03)
16-44 Years 10,749 (294) 10,408 (477) 3.62 (0.04) 3.68 (0.26) 0.38 (0.01) 0.37 (0.02)
45-64 Years 9,134 (200) 8,753 (402) 4.97 (0.04) 5.11 (0.37) 1.74 (0.03) 1.63 (0.10)
65+ Years 13,229 (273) 12,863 (589) 5.54 (0.04) 5.56 (0.40) 4.07 (0.05) 4.10 (0.26)
Gender
Female 23,202 (492) 22,478 (1,026) 4.33 (0.03) 4.43 (0.32) 1.64 (0.02) 1.75 (0.11)
Male 16,230 (324) 15,937 (728) 4.95 (0.04) 5.02 (0.36) 2.36 (0.03) 2.17 (0.14)
Race
White 18,459 (672) 22,620* (1,477) 4.69 (0.03) 4.71 (0.47) 2.22 (0.03) 2.02 (0.18)
Black 4,138 (312) 4,779 (334) 5.22 (0.08) 5.33 (0.59) 1.83 (0.05) 1.97 (0.19)
Other 5,912 (387) 1,508** (207) 4.35 (0.09) 4.541 (c) 1.35 (0.04) 1.511 (c)
Unknown 11,031 (799) 9,507 (1,238) 4.29 (0.06) 4.291 (c) 1.80 (0.05) 1.731 (c)

*Significant at p<0.05.
**Significant at p<0.01.
1 A significance test was not performed because a valid standard error was not available.
(c) A valid standard error could not be calculated.

 

Return to Contents

 

Table 11. NIS and NHDS Comparisons by Principal Payer, 2007
  Number of Discharges in Thousands (Standard Error) Average Length of Stay in Days (Standard Error) In-Hospital Mortality Rate Percent (Standard Error)
NIS NHDS NIS NHDS NIS NHDS
Medicare 14,381 (294) 13,277 (678) 5.62 (0.04) 5.72 (0.44) 3.56 (0.04) 3.57 (0.25)
Medicaid 7,663 (301) 7,589 (603) 4.33 (0.08) 4.621 (c) 0.80 (0.02) 0.81 (0.09)
Private Insurance 13,719 (459) 13,280 (768) 3.76 (0.03) 3.83 (0.36) 1.00 (0.03) 1.00 (0.08)
Self Pay 2,104 (106) 1,737* (109) 3.89 (0.07) 3.72 (0.39) 1.25 (0.05) 1.39 (0.12)
No Charge 205 (53) 94 (18) 4.91 (0.48) 4.351 (c) 1.21 (0.15) 1.801 (c)
Other 1,383 (92) 2,436* (461) 4.45 (0.10) 4.441 (c) 1.69 (0.12) 1.821 (c)
Missing 41 (16) 01 (a) 4.18 (0.26) 0.001 (a) 1.61 (0.23) 0.001 (a)

*Significant at p<0.05.
**Significant at p<0.01.
1A significance test was not performed because a valid standard error was not available.
(a) Because of very small sample size, the NHDS estimate and standard error were unreliable and not reported.
(c) A valid standard error could not be calculated.

 

Figure 2. Discharge Estimates for the 25 Most Common Principal Diagnoses, NIS, 2007

Figure 2: Discharge Estimates for the 25 Most Common Principal Diagnoses, NIS, 2007

 

DXCCS Average Total Charge Discharge Estimate Diagnosis
2 $57,607 134,019 Septicemia (except in labor)
50 $26,308 101,574 Diabetes mellitus with complications
55 $15,488 103,450 Fluid and electrolyte disorders
100 $54,714 122,764 Acute myocardial infarction
101 $46,842 192,378 Coronary atherosclerosis and other heart disease
102 $14,854 157,578 Nonspecific chest pain
106 $27,964 145,474 Cardiac dysrhythmias
108 $31,730 203,354 Congestive heart failure; nonhypertensive
109 $39,621 104,005 Acute cerebrovascular disease
122 $25,652 232,808 Pneumonia (except caused by tuberculosis or sexually transmitted disease)
127 $20,890 118,110 Chronic obstructive pulmonary disease and bronchiectasis
149 $30,265 91,077 Biliary tract disease
159 $18,513 106,450 Urinary tract infections
181 $10,411 107,026 Other complications of pregnancy
189 $13,114 114,254 Previous C-section
193 $8,420 173,297 OB-related tramuma to perineum and vulva
195 $11,946 162,915 Other complications of birth; puerperium affecting management of mother
197 $18,205 120,667 Skin and subcutaneous tissue infections
203 $41,518 165,657 Osteoarthritis
205 $41,140 129,443 Spondylosis; intervertebral disc disorders; other back problems
218 $8,642 903,719 Liveborn
237 $49,275 124,544 Complication of device; implant or graft
238 $33,896 95,530 Complications of surgical procedures or medical care
254 $31,950 88,039 Rehabilitation care; fitting of prostheses; and adjustment of devices
657 $14,382 155,154 Mood disorders

 

Table 12. NIS and NHDS Comparisons by the 25 Most Common Principal Diagnoses, 2007
  Number of Discharges in Thousands (Standard Error) Average Length of Stay in Days (Standard Error) In-Hospital Mortality Rate Percent (Standard Error)
NIS NHDS NIS NHDS NIS NHDS
218: Liveborn 4,542 (180) 4,051 (188) 3.35 (0.06) 3.46 (0.25) 0.33 (0.01) 0.41* (0.02)
122: Pneumonia (except that caused by tuberculosis or sexually transmitted disease) 1,171 (21) 1,072 (52) 5.41 (0.04) 5.04 (0.38) 3.52 (0.07) 3.71 (0.25)
108: Congestive heart failure; nonhypertensive 1,024 (23) 1,023 (50) 5.26 (0.04) 5.10 (0.38) 3.31 (0.06) 2.91 (0.20)
101: Coronary atherosclerosis and other heart disease 963 (40) 968 (47) 3.31 (0.04) 3.22 (0.24) 0.51 (0.01) 0.58 (0.04)
193: OB-related trauma to perineum and vulva 867 (48) --1 (a) 2.08 (0.01) --1 (a) 0.00 (0.00) --1 (a)
203: Osteoarthritis 814 (37) 718 (36) 3.52 (0.04) 3.67 (0.28) 0.09 (0.00) 0.06** (0.00)
195: Other complications of birth; puerperium affecting management of mother 810 (33) 71** (5) 2.79 (0.03) 3.92* (0.44) 0.02 (0.00) 0.20** (0.02)
102: Nonspecific chest pain 788 (28) 31** (3) 1.87 (0.01) 1.711 (c) 0.06 (0.00) 0.001 (c)
657: Mood Disorders 774 (44) 1,070** (52) 6.89 (0.18) 7.00 (0.53) 0.03 (0.00) 0.07** (0.00)
106: Cardiac dysrhythmias 731 (19) 807 (40) 3.45 (0.03) 3.56 (0.27) 0.97 (0.03) 1.24** (0.08)
2: Septicemia (except in labor) 675 (17) 596* (30) 9.05 (0.11) 9.32 (0.72) 17.26 (0.25) 18.53 (1.34)
205: Spondylosis; intervertebral disc disorders; other back problems 633 (25) 609 (31) 3.01 (0.04) 3.46 (0.27) 0.15 (0.01) 0.24** (0.01)
100: Acute myocardial infarction 624 (21) 577 (29) 5.03 (0.05) 5.09 (0.40) 6.13 (0.10) 6.68 (0.48)
237: Complication of device; implant or graft 623 (20) 547* (28) 5.99 (0.07) 5.95 (0.46) 1.66 (0.05) 1.73 (0.12)
197: Skin and subcutaneous tissue infections 604 (13) 569 (29) 4.51 (0.03) 4.46 (0.35) 0.35 (0.02) 0.30 (0.02)
127: Chronic obstructive pulmonary disease and bronchiectasis 593 (13) 648 (33) 4.67 (0.04) 4.42 (0.34) 1.79 (0.05) 1.55 (0.11)
189: Previous C-section 561 (23) --1 (a) 2.85 (0.02) --1 (a) 0.00 (0.00) --1 (a)
159: Urinary tract infections 535 (11) 669** (34) 4.38 (0.03) 4.42 (0.34) 0.99 (0.03) 1.23* (0.08)
181: Other complications of pregnancy 531 (19) 181** (11) 2.41 (0.01) 2.37 (0.22) 0.03 (0.00) 0.00** (0.00)
109: Acute cerebrovascular disease 527 (13) 486 (25) 6.16 (0.09) 6.26 (0.49) 9.34 (0.19) 9.22 (0.68)
55: Fluid and electrolyte disorders 519 (11) 753** (37) 3.59 (0.03) 3.64 (0.28) 1.63 (0.05) 1.81 (0.12)
50: Diabetes mellitus with complications 510 (11) 500 (26) 5.15 (0.05) 5.62 (0.44) 0.79 (0.03) 0.73 (0.05)
238: Complications of surgical procedures or medical care 481 (12) 478 (25) 6.13 (0.07) 6.25 (0.49) 1.32 (0.04) 0.91** (0.06)
149: Biliary tract disease 454 (10) 419 (22) 4.17 (0.03) 3.96 (0.32) 0.67 (0.02) 0.48** (0.03)
254: Rehabilitation care; fitting of prostheses; and adjustment of devices 438 (29) 397 (21) 12.85 (0.22) 12.88 (1.02) 0.62 (0.06) 0.11** (0.00)

*Significant at p<0.05.
**Significant at p<0.01.
1A significance test was not performed because a valid standard error was not available.
(a) Because of very small sample size, the NHDS estimate and standard error were unreliable and not reported.
(c) A valid standard error could not be calculated.

 

Return to Contents

 

Figure 3. Discharge Estimates for the 25 Most Common Principal Procedures, NIS, 2007

Figure 3: Discharge Estimates for the 25 Most Common Principal Procedures, NIS, 2007

 

PRCCS Average Total Charge 2007 Discharge Estimate Procedure
45 $51,812 133,318 Percutaneous transluminal coronary angioplasty (PTCA)
47 $31,275 115,223 Diagnostic cardiac catheterization; coronary arteriography
48 $75,902 65,747 Insertion; revision; replacement; removal of cardiac pacemaker or cardioverter/defibrillator
54 $45,726 111,687 Other vascular catheterization; not heart
58 $28,277 68,227 Hemodialysis
61 $74,813 60,432 Other OR precedures on vessels other than head and neck
70 $27,900 136,794 Upper gastrointestinal endoscopy; biopsy
76 $26,472 48,963 Colonoscopy and biopsy
78 $65,266 56,830 Colorectal resection
80 $24,639 60,270 Appendectomy
84 $35,414 76,864 Cholecystectomy and common duct exploration
115 $5,980 242,709 Circumcision
124 $21,738 104,260 Hysterectomy; abdominal and vaginal
134 $15,889 298,240 Cesarean section
137 $8,803 335,883 Other procedures to assist delivery
140 $8,210 141,680 Repair of current obstetric laceration
146 $42,567 53,409 Treatment; fracture or dislocation of hip and femur
152 $42,474 123,019 Anthroplasty knee
153 $48,035 81,268 Hip replacement; total and partial
158 $74,954 72,106 Spinal fusion
216 $74,120 149,183 Respiratory intubation and mechanical ventilation
219 $12,067 67,587 Alcohol and drug rehabiliation/detoxification
222 $27,836 136,708 Blood transfusion
228 $5,156 199,108 Prophylactic vaccinations and inoculations
231 $23,007 122,996 Other therapeutic procedures

 

Table 13. NIS and NHDS Comparisons by the 25 Most Common Principal Procedures, 2007
  Number of Discharges in Thousands (Standard Error) Average Length of Stay in Days (Standard Error) In-Hospital Mortality Rate Percent (Standard Error)
NIS NHDS NIS NHDS NIS NHDS
137: Other procedures to assist delivery 1,677 (84) 1,150** (56) 2.15 (0.02) 2.15 (0.16) 0.00 (0.00) 0.00** (0.00)
134: Cesarean section 1,479 (64) 1,336 (64) 3.61 (0.04) 3.49 (0.26) 0.01 (0.00) 0.01 (0.00)
115: Circumcision 1,238 (55) 1,147 (55) 3.03 (0.04) 2.99 (0.22) 0.00 (0.00) 0.07** (0.00)
228: Prophylactic vaccinations and inoculations 1,025 (105) 922 (45) 2.58 (0.04) 2.55 (0.19) 0.02 (0.00) 0.08** (0.00)
216: Respiratory intubation and mechanical ventilation 754 (18) 671* (34) 10.57 (0.18) 9.82 (0.75) 25.18 (0.34) 24.28 (1.74)
140: Repair of current obstetric laceration 708 (41) 770 (38) 2.18 (0.01) 2.19 (0.17) 0.00 (0.00) 0.00 (0.00)
222: Blood transfusion 694 (22) 615* (31) 5.62 (0.05) 5.68 (0.44) 4.18 (0.09) 4.49 (0.32)
70: Upper gastrointestinal endoscopy; biopsy 685 (16) 653 (33) 5.27 (0.04) 5.26 (0.41) 1.24 (0.03) 0.95** (0.06)
45: Percutaneous transluminal coronary angioplasty (PTCA) 668 (36) 557* (28) 2.70 (0.04) 2.72 (0.21) 0.80 (0.03) 0.70 (0.05)
231: Other therapeutic procedures 637 (61) 570 (29) 5.10 (0.12) 5.21 (0.41) 2.62 (0.19) 3.59** (0.26)
152: Arthroplasty knee 605 (26) 554 (28) 3.62 (0.04) 3.54 (0.28) 0.08 (0.00) 0.24** (0.01)
47: Diagnostic cardiac catheterization; coronary arteriography 576 (22) 512 (26) 3.59 (0.04) 3.75 (0.30) 0.81 (0.04) 1.09** (0.08)
54: Other vascular catheterization; not heart 558 (18) 520 (27) 8.89 (0.12) 8.66 (0.67) 6.99 (0.14) 6.72 (0.49)
124: Hysterectomy; abdominal and vaginal 516 (17) 498 (26) 2.58 (0.04) 2.42 (0.19) 0.07 (0.00) 0.05* (0.00)
153: Hip replacement; total and partial 402 (17) 372 (20) 4.64 (0.05) 4.60 (0.37) 0.83 (0.04) 0.74 (0.05)
84: Cholecystectomy and common duct exploration 382 (9) 357 (19) 4.62 (0.04) 4.56 (0.37) 0.65 (0.03) 0.78 (0.06)
158: Spinal fusion 350 (18) 339 (18) 3.91 (0.09) 4.13 (0.34) 0.23 (0.02) 0.09** (0.00)
219: Alcohol and drug rehabilitation/detoxification 346 (35) 336 (18) 5.55 (0.43) 5.05 (0.41) 0.12 (0.02) 0.28** (0.02)
58: Hemodialysis 343 (13) 337 (18) 5.35 (0.09) 5.15 (0.42) 2.69 (0.09) 2.72 (0.21)
48: Insertion; revision; replacement; removal of cardiac pacemaker or cardioverter/defibrillator 329 (13) 273** (15) 4.63 (0.07) 4.77 (0.40) 0.89 (0.04) 1.13* (0.09)
61: Other OR procedures on vessels other than head and neck 305 (10) 260* (15) 8.71 (0.26) 8.81 (0.73) 3.75 (0.12) 3.68 (0.30)
80: Appendectomy 300 (8) 303 (17) 2.74 (0.03) 2.77 (0.23) 0.11 (0.01) 0.21** (0.01)
78: Colorectal resection 287 (7) 250* (14) 9.77 (0.08) 9.43 (0.79) 3.72 (0.10) 2.90** (0.24)
146: Treatment; fracture or dislocation of hip and femur 269 (6) 269 (15) 6.07 (0.07) 5.99 (0.50) 1.60 (0.06) 1.81 (0.14)
76: Colonoscopy and biopsy 246 (5) 226 (13) 5.39 (0.04) 5.16 (0.44) 0.74 (0.04) 0.75 (0.06)

*Significant at p<0.05.
**Significant at p<0.01.

 

Return to Contents

 

Table 14. NIS and NHDS Comparisons by Infrequent Principal Diagnoses, 2007
  Number of Discharges in Thousands (Standard Error) Average Length of Stay in Days (Standard Error) In-Hospital Mortality Rate Percent (Standard Error)
NIS NHDS NIS NHDS NIS NHDS
1: Tuberculosis 8 (0) 11 (2) 15.66 (1.15) 7.491 (c) 3.38 (0.49) 0.651 (c)
11: Cancer of head and neck 32 (3) 29 (3) 7.67 (0.19) 6.221 (c) 3.77 (0.39) 6.591 (c)
12: Cancer of esophagus 13 (0) 8** (1) 9.44 (0.29) 10.721 (c) 9.54 (0.76) 11.011 (c)
123: Influenza 17 (0) 23 (3) 3.74 (0.10) 4.091 (c) 1.07 (0.20) 0.531 (c)
13: Cancer of stomach 25 (1) 17* (2) 10.55 (0.21) 8.701 (c) 8.27 (0.51) 11.901 (c)
148: Peritonitis and intestinal abscess 27 (0) 37* (3) 7.90 (0.12) 7.961 (c) 4.05 (0.25) 1.771 (c)
15: Cancer of rectum and anus 47 (2) 37* (3) 8.58 (0.11) 7.881 (c) 3.08 (0.21) 3.571 (c)
16: Cancer of liver and intrahepatic bile duct 20 (1) 17 (2) 6.49 (0.17) 7.651 (c) 12.38 (0.93) 15.171 (c)
17: Cancer of pancreas 35 (1) 35 (3) 8.51 (0.14) 8.131 (c) 10.25 (0.48) 9.531 (c)
21: Cancer of bone and connective tissue 17 (2) 11 (2) 7.52 (0.29) 6.021 (c) 3.22 (0.47) 4.671 (c)
227: Spinal cord injury 13 (0) 8* (1) 14.01 (0.61) 11.511 (c) 5.57 (0.45) 4.721 (c)
240: Burns 27 (4) 78** (6) 8.75 (0.51) 6.81* (0.72) 3.17 (0.37) 2.10* (0.23)
243: Poisoning by nonmedicinal substances 19 (0) 18 (2) 3.32 (0.11) 3.631 (c) 1.58 (0.23) 2.131 (c)
25: Cancer of uterus 41 (2) 30* (3) 4.19 (0.10) 4.151 (c) 1.26 (0.14) 1.351 (c)
26: Cancer of cervix 23 (1) 20 (2) 3.55 (0.09) 3.661 (c) 1.60 (0.18) 0.791 (c)
27: Cancer of ovary 25 (1) 25 (3) 6.76 (0.15) 6.001 (c) 4.48 (0.38) 3.971 (c)
30: Cancer of testis 2 (0) --1 (a) 6.31 (0.39) --1 (a) 2.38 (0.79) --1 (a)
32: Cancer of bladder 38 (2) 34 (3) 6.23 (0.18) 5.481 (c) 3.13 (0.22) 1.791 (c)
35: Cancer of brain and nervous system 37 (3) 33 (3) 7.08 (0.19) 7.561 (c) 3.88 (0.30) 5.341(c)
36: Cancer of thyroid 29 (2) 25 (3) 2.29 (0.07) 1.811 (c) 0.66 (0.10) 0.191 (c)
37: Hodgkin’s disease 5 (0) 7 (1) 11.16 (0.95) 5.061 (c) 4.75 (0.63) 1.951 (c)
39: Leukemias 43 (3) 56* (5) 15.07 (0.72) 10.96** (1.23) 13.52 (0.63) 13.24 (1.69)
60: Acute posthemorrhagic anemia 14 (0) 65** (5) 3.50 (0.08) 8.16** (0.90) 0.93 (0.17) 0.07** (0.00)
76: Meningitis (except that caused by tuberculosis or sexually transmitted disease) 42 (1) 42 (4) 5.03 (0.09) 5.041 (c) 1.45 (0.13) 0.481 (c)
77: Encephalitis (except that caused by tuberculosis or sexually transmitted disease) 9 (0) 10 (1) 9.57 (0.31) 9.541 (c) 3.66 (0.43) 7.551 (c)

*Significant at p<0.05.
**Significant at p<0.01.
1A significance test was not performed because a valid standard error was not available.
(a) Because of very small sample size, the NHDS estimate and standard error were unreliable and not reported.
(b) The NHDS estimate was reported but is not considered reliable; the standard error was not reported.
(c) A valid standard error could not be calculated.

 

Summary of NIS-MedPAR Comparisons

 

Table 15. NIS and MedPAR Comparisons by Region, 2007
  Number of Discharges in Thousands (Standard Error) Percentage of Discharges (Standard Error) Average Length of Stay in Days (Standard Error) In-Hospital Mortality Rate Percent (Standard Error) Average Total Hospital charge (Standard Error)
NIS MedPAR NIS MedPAR NIS MedPAR NIS MedPAR NIS MedPAR
U.S. 14,381 (293) 12,912** n/a n/a 5.63 (0.04) 5.80** 3.56 (0.04) 3.51 $32,752 (689) $32,794
Region
Northeast 2,939 (148) 2,554** 20.43 (0.89) 19.78 6.29 (0.10) 6.42 4.12 (0.11) 3.85* $34,985 (1,947) $36,837
South 3,545 (131) 3,503 24.65 (0.82) 27.13** 5.18 (0.06) 5.35** 3.06 (0.07) 3.12 $25,899 (830) $26,705
Midwest 5,620 (195) 5,053** 39.08 (1.02) 39.13 5.65 (0.06) 5.89** 3.48 (0.06) 3.54 $29,865 (816) $30,575
West 2,276 (92) 1,800** 15.82 (0.62) 13.94** 5.45 (0.10) 5.50 3.81 (0.11) 3.75 $48,668 (2,577) $45,135

*Significant at p<0.05.
**Significant at p<0.01.

 

Table 16. NIS and MedPAR Comparisons by Hospital Control, 2007
  Number of Discharges in Thousands (Standard Error) Percentage of Discharges (Standard Error) Average Length of Stay in Days (Standard Error) In-Hospital Mortality Rate Percent (Standard Error) Average Total Hospital charge (Standard Error)
NIS MedPAR NIS MedPAR NIS MedPAR NIS MedPAR NIS MedPAR
Total Public 1,817 (170) 1,603 12.63 (1.19) 12.42 5.60 (0.14) 5.54 3.64 (0.09) 3.58 $26,698 (1,426) $27,207
1-99 Beds 485 (29) 431 26.72 (2.03) 26.92 4.68 (0.15) 4.33* 3.43 (0.11) 3.15* $12,610 (556) $11,773
100-199 Beds 297 (48) 286 16.35 (2.65) 17.86 5.09 (0.15) 5.31 3.95 (0.24) 3.56 $30,170 (4,707) $24,187
200-299 Beds 224 (48) 197 12.35 (2.88) 12.32 5.49 (0.21) 5.64 3.50 (0.36) 3.61 $25,715 (2,058) $30,030*
300-499 Beds 235 (76) 313 12.95 (4.05) 19.57 6.15 (0.36) 6.21 3.60 (0.34) 3.85 $33,324 (4,052) $34,207
500+ Beds 574 (100) 373* 31.61 (4.60) 23.30 6.45 (0.32) 6.49 3.73 (0.17) 3.86 $34,311 (2,822) $39,981*
Total Private Non-Profit 10,480 (336) 9,422** 72.87 (1.47) 72.97 5.59 (0.04) 5.64 3.58 (0.05) 3.49 $31,741 (847) $31,963
1-99 Beds 1,042 (50) 1,026 9.94 (0.53) 10.89 4.68 (0.10) 4.75 3.62 (0.10) 3.22** $18,284 (883) $17,240
100-199 Beds 1,826 (113) 1,668 17.42 (1.11) 17.70 5.28 (0.07) 5.44* 3.66 (0.10) 3.44* $26,601 (1,476) $25,949
200-299 Beds 2,346 (196) 1,921* 22.39 (1.89) 20.39 5.53 (0.09) 5.54 3.39 (0.10) 3.53 $28,973 (1,384) $30,404
300-499 Beds 3,517 (305) 2,696** 33.55 (2.79) 28.61 5.79 (0.08) 5.73 3.60 (0.11) 3.47 $34,709 (1,631) $34,766
500+ Beds 1,748 (284) 2,109 16.67 (2.56) 22.38* 6.16 (0.14) 6.21 3.68 (0.15) 3.68 $42,449 (2,677) $41,726
Total Proprietary 2,083 (130) 1,885 14.48 (0.91) 14.60 5.88 (0.14) 6.79** 3.38 (0.11) 3.55 $43,050 (2,040) $41,700
1-99 Beds 423 (39) 471 20.31 (1.77) 24.98** 6.38 (0.47) 8.79** 3.68 (0.29) 3.50 $33,721 (2,210) $34,735
100-199 Beds 669 (54) 557* 32.12 (2.42) 29.55 5.63 (0.20) 5.94 3.12 (0.17) 3.41 $41,829 (3,543) $37,664
200-299 Beds 529 (82) 412 25.39 (3.60) 21.89 5.75 (0.26) 6.17 3.36 (0.16) 3.72* $41,029 (3,486) $44,081
300-499 Beds 368 (67) 294 17.68 (3.29) 15.60 5.80 (0.15) 6.26** 3.37 (0.23) 3.60 $54,077 (5,466) $53,768
500+ Beds 93 (40) 150 4.48 (1.92) 7.95 6.30 (0.25) 6.38 3.97 (0.53) 3.68 $61,564 (3,157) $48,342**

*Significant at p<0.05.
**Significant at p<0.01.

 

Return to Contents

 

Table 17. NIS and MedPAR Comparisons by Hospital Location and Teaching Status, 2007
  Number of Discharges in Thousands (Standard Error) Percentage of Discharges (Standard Error) Average Length of Stay in Days (Standard Error) In-Hospital Mortality Rate Percent (Standard Error) Average Total Hospital charge (Standard Error)
NIS MedPAR NIS MedPAR NIS MedPAR NIS MedPAR NIS MedPAR
Rural 2,308 (98) 2,121 16.05 (0.65) 16.42 4.87 (0.07) 4.76 3.56 (0.07) 3.36** $17,763 (597) $17,334
Small 641 (26) 561** 27.79 (1.49) 26.46 4.25 (0.09) 4.08 3.51 (0.12) 3.10** $11,240 (500) $10,849
Medium 473 (43) 528 20.51 (2.19) 24.90* 4.59 (0.09) 4.57 3.45 (0.11) 3.33 $16,582 (705) $16,189
Large 1,193 (110) 1,031 51.68 (2.93) 48.63 5.31 (0.11) 5.23 3.63 (0.11) 3.51 $21,718 (927) $21,449
Urban, Non-teaching 6,395 (181) 5,647** 44.47 (1.00) 43.73 5.66 (0.06) 5.94** 3.53 (0.06) 3.51 $34,099 (999) $33,810
Small 801 (52) 792 12.52 (0.82) 14.03 5.95 (0.28) 7.44** 3.74 (0.18) 3.39 $29,107 (1,476) $29,307
Medium 1,891 (98) 1,536** 29.57 (1.59) 27.20 5.45 (0.09) 5.64 3.54 (0.10) 3.49 $33,464 (1,989) $31,119
Large 3,702 (181) 3,318* 57.89 (1.72) 58.75 5.70 (0.07) 5.72 3.48 (0.08) 3.55 $35,501 (1,427) $36,131
Urban, Teaching 5,676 (208) 5,143* 39.47 (1.04) 39.83 5.92 (0.06) 6.07* 3.59 (0.08) 3.58 $37,376 (1,296) $38,055
Small 907 (124) 672 15.99 (2.13) 13.06 5.53 (0.15) 5.92* 3.37 (0.22) 3.44 $30,418 (2,190) $32,867
Medium 1,636 (222) 1,321 28.83 (4.00) 25.69 5.93 (0.11) 6.02 3.74 (0.17) 3.57 $38,462 (2,873) $36,779
Large 3,132 (293) 3,150 55.17 (4.33) 61.24 6.02 (0.11) 6.12 3.58 (0.11) 3.62 $38,658 (1,713) $39,698

*Significant at p<0.05.
**Significant at p<0.01.

 

Table 18. NIS and MedPAR Comparisons by Patient Characteristics, 2007
  Number of Discharges in Thousands (Standard Error) Percentage of Discharges (Standard Error) Average Length of Stay in Days (Standard Error) In-Hospital Mortality Rate Percent (Standard Error) Average Total Hospital charge (Standard Error)
NIS MedPAR NIS MedPAR NIS MedPAR NIS MedPAR NIS MedPAR
Age Group
0-64 Years 2,601 (67) 2,382** 18.09 (0.35) 18.45 5.92 (0.06) 6.15** 1.83 (0.03) 1.85 $32,258 (769) $32,883
65-74 Years 4,187 (91) 3,788** 29.11 (0.20) 29.34 5.39 (0.03) 5.58** 2.75 (0.03) 2.81 $35,552 (734) $35,938
75-84 Years 4,842 (109) 4,152** 33.67 (0.20) 32.15** 5.67 (0.04) 5.80** 3.92 (0.05) 3.77** $33,334 (706) $33,136
85+ Years 2,747 (66) 2,588* 19.10 (0.23) 20.04** 5.66 (0.05) 5.79* 5.80 (0.08) 5.66 $27,925 (692) $27,561
Gender
Female 8,110 (164) 7,244** 56.39 (0.15) 56.10 5.58 (0.04) 5.75** 3.31 (0.04) 3.26 $30,845 (644) $30,816
Male 6,263 (132) 5,667** 43.54 (0.15) 43.89* 5.71 (0.04) 5.86** 3.89 (0.04) 3.83 $35,218 (754) $35,322
Race
White 8,177 (303) 10,657** 56.86 (1.60) 82.53** 5.59 (0.04) 5.64 3.66 (0.05) 3.53* $33,424 (847) $31,976
Black 1,258 (98) 1,598** 8.75 (0.66) 12.38** 6.51 (0.10) 6.63 3.47 (0.08) 3.42 $36,841 (1,700) $34,711
Other 1,148 (81) 616** 7.98 (0.56) 4.77** 6.25 (0.11) 6.23 3.69 (0.11) 3.60 $42,391 (1,628) $41,912
Unknown 3,796 (267) 39** 26.40 (1.82) 0.30** 5.25 (0.06) 5.74** 3.34 (0.07) 2.62** $27,111 (939) $33,533**

*Significant at p<0.05.
**Significant at p<0.01.

 

Figure 4. Medicare Discharge Estimates for the 25 Most Common DRGs in the NIS, 2007

Figure 4. Medicare Discharge Estimates for the 25 Most Common DRGs in the NIS, 2007

 

DRG Average Total Charge 2007 Discharge Estimate Diagnosis Related Group
14 $26,192 45,148 Intracranial Hemorrhage Or Cerebral Infarction
79 $35,398 29,020 Respiratory Infections & Inflammations Age >17 W CC
87 $29,518 21,199 Pulmonary Edema & Respiratory Failure
88 $18,950 68,577 Chronic Obstructive Pulmonary Disease
89 $21,926 86,190 Simple Pneumonia & Pleurisy Age >17 W CC
121 $32,258 23,321 Circulatory Disorders W Ami & Major Comp, Discharged Alive
127 $22,327 107,649 Heat Failure & Shock
138 $17,766 38,468 Cardia Arrhythmia & Conduction Disorders W CC
141 $17,074 23,159 Syncope & Collapse W CC
143 $13,211 41,297 Chest Pain
174 $22,999 42,074 G.I. Hemoorrhage W CC
182 $17,261 47,167 Esophagitis, Gastroent & Misc Digest Disorders Age >17W CC
210 $41,571 21,838 Hip & Femur Procedures Except Major Joint Age >17W CC
243 $21,582 19,201 Medical Back Problems
277 $20,099 22,857 Cellulitis Age >17W CC
296 $17,399 42,492 Nutritional & Misc Metabolic Disorders Age >17 W CC
316 $25,777 49,522 Renal Failure
320 $19,051 41,792 Kidney & Urinary Tract Infections Age >17 W CC
395 $18,425 22,095 Red Blood Cell Disorders Age >17
430 $20,531 50,969 Psychoses
462 $29,362 47,805 Rehabililation
470 $41,898 23,704 Ungroupable
544 $42,280 79,353 Major Joint Replacement Or Reattachment Of Lower Extremity
558 $44,377 20,728 Percutaneous Cardiovascular Proc W Drug-Eluting Stent W/O Maj Cv Dx
576 $36,618 56,908 Septicemia W/O Mv 96+ Hours Age>17

 

Table 19. NIS and MedPAR Comparisons by DRG, 2007
  Number of Discharges in Thousands (Standard Error) Percentage of Discharges (Standard Error) Average Length of Stay in Days (Standard Error) In-Hospital Mortality Rate Percent (Standard Error) Average Total Hospital charge (Standard Error)
NIS MedPAR NIS MedPAR NIS MedPAR NIS MedPAR NIS MedPAR
127: Heart Failure & Shock 545 (12) 626** 3.79 (0.05) 4.84** 5.00 (0.03) 5.01 3.41 (0.07) 3.38 $22,166 (578) $21,829
89: Simple Pneumonia & Pleurisy Age >17 w CC 437 (9) 479** 3.04 (0.04) 3.71** 5.30 (0.04) 5.29 3.58 (0.08) 3.57 $21,714 (512) $21,324
544: Major Joint and Limb Reattachments Procedures of Lower Extremity 393 (16) 461** 2.73 (0.09) 3.57** 4.19 (0.03) 4.19 0.54 (0.02) 0.56 $41,944 (839) $41,944
88: Chronic Obstructive Pulmonary Disease 346 (8) 406** 2.40 (0.04) 3.14** 4.67 (0.04) 4.71 1.28 (0.05) 1.22 $18,762 (432) $18,977
576: Septicemia without Mechanical Ventilation 96 + Hours Age >17 287 (8) 335** 1.99 (0.04) 2.59** 7.11 (0.08) 7.11 17.49 (0.29) 17.25 $36,472 (944) $35,613
430: Psychoses 256 (15) 329** 1.78 (0.10) 2.55** 10.50 (0.28) 10.53 0.09 (0.01) 0.08 $20,613 (732) $20,379
316: Renal Failure 251 (6) 275** 1.74 (0.03) 2.13** 5.72 (0.05) 5.85* 5.31 (0.13) 5.31 $25,551 (605 $25,843
182: Esophagitis 239 (5) 269** 1.66 (0.02) 2.09** 3.93 (0.03) 3.95 0.77 (0.04) 0.78 $17,125 (376) $17,075
462: Rehabilitation 237 (16) 339** 1.65 (0.11) 2.63** 12.08 (0.17) 13.03** 0.70 (0.07) 0.25** $29,202 (1,074) $29,673
14: Intracranial hemorrhage and stroke with infarction 228 (5) 271** 1.58 (0.02) 2.10** 5.11 (0.04) 5.36** 9.33 (0.23) 9.10 $26,126 (644) $26,155
296: Nutritional & Misc Metabolic Disorders Age >17 w CC 215 (4) 241** 1.49 (0.02) 1.86** 4.34 (0.03) 4.41 2.82 (0.10) 2.65 $17,273 (431) $17,180
174: G.I. Hemorrhage w CC 212 (5) 243** 1.47 (0.01) 1.88** 4.55 (0.03) 4.58 2.43 (0.07) 2.54 $22,933 (527) $22,557
320: Kidney & Urinary Tract Infections Age >17 w CC 211 (5) 246** 1.47 (0.02) 1.90** 4.78 (0.04) 4.82 1.47 (0.06) 1.49 $18,971 (570) $18,386
143: Chest Pain 208 (7) 225* 1.45 (0.03) 1.74** 2.08 (0.02) 2.08 0.09 (0.01) 0.11 $13,090 (346) $12,733
138: Cardiac Arrhythmia & Conduction Disorders w CC 194 (4) 224** 1.35 (0.01) 1.74** 3.76 (0.03) 3.79 2.02 (0.08) 2.09 $17,679 (431) $17,682
79: Respiratory Infections & Inflammations Age >17 w CC 146 (4) 168** 1.01 (0.02) 1.30** 8.07 (0.10) 8.13 10.18 (0.23) 10.02 $35,040 (976) $35,147
121: Circulatory Disorders w AMI & Major Comp 119 (3) 134** 0.83 (0.01) 1.04** 5.81 (0.05) 5.88 0.00 (0.00) 0.001 $32,147 (830) $31,929
141: Syncope & Collapse w CC 117 (3) 131** 0.81 (0.01) 1.01** 3.30 (0.03) 3.29 0.40 (0.04) 0.39 $16,966 (462) $16,640
470: Ungroupable 116 (5) 0** 0.80 (0.03) 0.00** 3.90 (0.04) 2.50** 0.21 (0.03) 0.00** $41,572 (858) $8,887**
277: Cellulitis Age >17 w CC 115 (2) 133** 0.80 (0.01) 1.03** 5.39 (0.05) 5.45 0.78 (0.06) 0.77 $19,919 (543) $19,602
395: Red Blood Cell Disorders Age >17 112 (2) 121** 0.77 (0.01) 0.94** 3.92 (0.04) 4.04* 1.02 (0.07) 1.21* $18,314 (465) $18,196
210: Hip amp; Femur Procedures Except Major Joint Age >17 w CC 110 (3) 130** 0.76 (0.01) 1.01** 6.43 (0.05) 6.45 2.11 (0.10) 2.32* $41,365 (951) $41,359
87: Pulmonary Edema & Respiratory Failure 106 (4) 124** 0.73 (0.02) 0.96** 6.32 (0.09) 6.74** 12.06 (0.33) 11.90 $29,204 (741) $30,927*
558: Percutaneous Cardiovascular Proc w Drug-Eluting Stent w/o Maj CV DX 103 (6) 119* 0.71 (0.03) 0.92** 1.82 (0.02) 1.72** 0.02 (0.01) 0.03 $44,151 (1,367) $45,973
243: Medical Back Problems 97 (2) 105** 0.67 (0.01) 0.81** 4.39 (0.03) 4.59** 0.89 (0.06) 0.95 $21,393 (483) $17,633**

*Significant at p<0.05.
**Significant at p<0.01.
1A significance test was not performed because a valid standard error was not available.

 

Return to Contents

 

Figure 5. Medicare Discharge Estimates for the 25 Most Common Principal Diagnoses, NIS, 2007

Figure 5. Medicare Discharge Estimates for the 25 Most Common Principal Diagnoses, NIS, 2007

 

DXCCS Average Total Charge Discharge Estimate Diagnosis
2 $54,674 92,040 Septicema (except in labor)
50 $30,027 43,896 Diabetes melitus with complications
55 $17,226 58,477 Fluid and electrolyte disorders
100 $51,813 68,970 Acute myocardial infarction
101 $47,310 104,923 Coronary atherosclerosis and other heart disease
102 $15,234 61,307 Nonspecific chest pain
106 $28,403 94,166 Cardiac dysrhythmias
108 $30,243 151,515 Congestive heart failure; nonhypertensive
109 $33,930 66,674 Acute cerebrovascular disease
122 $27,211 135,971 Pneumonia (except that caused by tuberculosis or sexually transmitted disease)
127 $21,307 82,497 Chronic obstructive pulmonary disease and bronchietctasis
131 $59,343 50,812 Respiratory failure; insufficiency; arrest (adult)
145 $33,651 35,749 Intestinal obstruction without hernia
153 $26,240 43,634 Gastrointestinal hemorrhage
157 $30,200 55,163 Acute and unspecified renal failure
159 $19,828 65,265 Urinary tract infections
197 $21,361 42,144 Skin and subcutaneous tissue infections
203 $41,329 92,374 Osteoarthritis
205 $39,171 47,449 Spondylosis; intervertebral disc disorders; other back problems
226 $40,596 50,139 Fracture of neck of femur (hip)
237 $49,244 72,281 Complication of device; implant or graft
238 $37,049 42,381 Complications of surgical procedures or medical care
245 $18,216 33,047 Syncope
254 $29,436 62,734 Rehabilitation care; fitting of prostheses; and adjustment of devices
657 $18,755 37,655 Mood disorders

 

Table 20. NIS and MedPAR Comparisons by the 25 Most Common Principal Diagnoses, 2007
  Number of Discharges in Thousands (Standard Error) Percentage of Discharges (Standard Error) Average Length of Stay in Days (Standard Error) In-Hospital Mortality Rate Percent (Standard Error) Average Total Hospital charge (Standard Error)
NIS MedPAR NIS MedPAR NIS MedPAR NIS MedPAR NIS MedPAR
108: Congestive heart failure; nonhypertensive 764 (17) 677** 5.31 (0.06) 5.24 5.31 (0.04) 5.39 3.55 (0.06) 3.62 $30,103 (801) $30,279
122: Pneumonia (except that caused by tuberculosis or sexually transmitted disease) 687 (13) 597** 4.78 (0.06) 4.62* 5.96 (0.05) 5.98 4.78 (0.09) 4.70 $26,983 (706) $26,446
101: Coronary atherosclerosis and other heart disease 525 (23) 481 3.65 (0.13) 3.72 3.55 (0.04) 3.59 0.71 (0.02) 0.73 $47,057 (1,329) $47,671
106: Cardiac dysrhythmias 473 (13) 423** 3.29 (0.04) 3.27 3.75 (0.03) 3.78 1.20 (0.04) 1.23 $28,348 (635) $28,510
2: Septicemia (except in labor) 463 (13) 402** 3.22 (0.07) 3.12 8.98 (0.13) 8.94 18.85 (0.29) 18.72 $54,700 (1,631) $53,188
203: Osteoarthritis 454 (20) 413* 3.16 (0.12) 3.20 3.67 (0.03) 3.72 0.12 (0.01) 0.12 $40,983 (837) $40,234
127: Chronic obstructive pulmonary disease and bronchiectasis 414 (9) 366** 2.88 (0.04) 2.83 4.89 (0.04) 4.94 1.98 (0.06) 1.92 $21,125 (497) $21,180
237: Complication of device; implant or graft 362 (11) 340 2.51 (0.05) 2.63* 6.20 (0.07) 6.24 2.01 (0.06) 2.09 $49,066 (1,351) $48,870
100: Acute myocardial infarction 351 (11) 314** 2.44 (0.05) 2.43* 5.63 (0.05) 5.68 8.39 (0.14) 8.36 $51,614 (1,379) $52,361
109: Acute cerebrovascular disease 337 (8) 306** 2.34 (0.03) 2.37 5.79 (0.06) 5.99** 9.67 (0.23) 9.51 $33,928 (1,012) $33,516
159: Urinary tract infections 330 (7) 293** 2.29 (0.03) 2.27 4.82 (0.04) 4.83 1.37 (0.05) 1.37 $19,753 (576) $18,882
254: Rehabilitation care; fitting of prostheses; and adjustment of devices 311 (21) 343 2.16 (0.14) 2.66** 12.24 (0.17) 13.09** 0.73 (0.07) 0.26** $29,304 (1,135) $30,029
102: Nonspecific chest pain 308 (10) 266** 2.14 (0.05) 2.06 2.18 (0.02) 2.19 0.11 (0.01) 0.12 $15,099 (375) $14,737
55: Fluid and electrolyte disorders 294 (6) 263** 2.05 (0.02) 2.04 4.10 (0.03) 4.13 2.13 (0.07) 2.20 $17,109 (436) $16,703
157: Acute and unspecified renal failure 279 (7) 239** 1.94 (0.03) 1.85* 6.41 (0.06) 6.49 5.76 (0.13) 5.81 $29,990 (791) $29,816
131: Respiratory failure; insufficiency; arrest (adult) 254 (7) 230** 1.76 (0.04) 1.78 9.37 (0.18) 10.17** 18.65 (0.34) 18.70 $58,948 (1,818) $61,588
226: Fracture of neck of femur (hip) 252 (6) 226** 1.75 (0.02) 1.75 6.17 (0.05) 6.28* 2.81 (0.08) 2.84 $40,384 (865) $39,481
205: Spondylosis; intervertebral disc disorders; other back problems 234 (8) 224 1.62 (0.04) 1.73* 3.69 (0.04) 3.73 0.29 (0.02) 0.29 $38,799 (1,047) $37,743
50: Diabetes mellitus with complications 221 (5) 195** 1.54 (0.02) 1.51 5.95 (0.07) 6.16** 1.30 (0.05) 1.30 $29,763 (791) $30,621
153: Gastrointestinal hemorrhage 219 (5) 192** 1.52 (0.01) 1.49 4.82 (0.04) 4.79 3.42 (0.09) 3.38 $26,148 (614) $25,196
238: Complications of surgical procedures or medical care 213 (5) 192** 1.48 (0.02) 1.48 6.87 (0.09) 7.13** 2.06 (0.07) 2.12 $36,841 (1,055) $37,112
197: Skin and subcutaneous tissue infections 212 (4) 188** 1.47 (0.01) 1.46 5.45 (0.05) 5.49 0.72 (0.04) 0.70 $21,164 (542) $20,422
657: Mood Disorders 189 (10) 188 1.31 (0.07) 1.46 9.15 (0.23) 9.25 0.09 (0.01) 0.07 $18,833 (680) $18,378
145: Intestinal obstruction without hernia 179 (4) 159** 1.24 (0.01) 1.23 6.62 (0.05) 6.69 3.66 (0.11) 3.66 $33,424 (706) $33,153
245: Syncope 166 (5) 142** 1.16 (0.02) 1.10 3.04 (0.03) 3.03 0.31 (0.03) 0.33 $18,141 (514) $17,510

*Significant at p<0.05.
**Significant at p<0.01.

 

Figure 6. Medicare Discharge Estimates for the 25 Most Common Principal Procedures, NIS, 2007

Figure 4. Medicare Discharge Estimates for the 25 Most Common Principal Procedures, NIS, 2007

 

PRCCS Average Total Charge 2007 Discharge Estimate Label
3 $29,596 16,875 Laminectomy; excision intervertebral disc
37 $48,679 17,099 Diagnostic bronchoscopy and biopsy of bronchus
39 $38,281 22,188 Incision of pleura; thoracentesis; chest drainage
44 $118,164 20,227 Coronary artery bypass graft (CABG)
45 $51,499 66,848 Percutaneous transluminal coronary angioplasty (PTCA)
47 $32,807 56,162 Diagnostic cardiac catheterization; coronary arteriography
48 $71,967 48,558 Insertion; revision; replacement; removal of cardiac pacemaker or cardioverter/defibrillator
51 $28,640 16,964 Endarterectomy; vessel of head and neck
54 $43,968 58,937 Other vascular catheterization; not heart
58 $28,181 50,699 Hemodialysis
61 $62,243 38,245 Other OR procedures on vessels other than head and neck
70 $29,265 74,896 Upper gastrointestinal endoscopy; biopsy
76 $27,776 27,487 Colonoscopy and biopsy
78 $71,850 27,871 Colorectal resection
84 $44,194 24,934 Cholecystectomy and common duct exploration
146 $40,344 36,555 Treatment; fracture or dislocation of hip and femur
152 $42,873 68,431 Anthroplasty knee
153 $48,276 49,979 Hip replacement; total and partial
158 $80,053 20,601 Spinal fusion
169 $55,958 18,993 Debridement of wound; infection or burn
193 $27,096 26,970 Diagnostic ultrasound of heart (echocardiogram)
213 $28,718 18,822 Physical therapy exercises; manipulation; and other procedures
216 $67,319 71,602 Respiratory intubation and mechanical ventilation
222 $27,574 86,521 Blood transfusion
231 $26,456 43,363 Other therapeutic procedures

 

Table 21. NIS and MedPAR Comparisons by the 25 Most Common Principal Procedures, 2007
  Number of Discharges in Thousands (Standard Error) Percentage of Discharges (Standard Error) Average Length of Stay in Days (Standard Error) In-Hospital Mortality Rate Percent (Standard Error) Average Total Hospital charge (Standard Error)
NIS MedPAR NIS MedPAR NIS MedPAR NIS MedPAR NIS MedPAR
222: Blood transfusion 441 (14) 374** 3.06 (0.08) 2.89* 5.85 (0.06) 5.96 4.71 (0.11) 4.87 $27,265 (689) $27,013
70: Upper gastrointestinal endoscopy; biopsy 375 (9) 338** 2.61 (0.04) 2.62 5.77 (0.04) 5.82 1.62 (0.05) 1.55 $29,163 (682) $28,145
216: Respiratory intubation and mechanical ventilation 362 (9) 314** 2.52 (0.04) 2.43 9.28 (0.12) 9.71** 33.57 (0.40) 34.26 $66,824 (1,970) $67,606
152: Arthroplasty knee 336 (15) 305* 2.34 (0.09) 2.36 3.76 (0.04) 3.75 0.12 (0.01) 0.12 $42,523 (874) $42,269
45: Percutaneous transluminal coronary angioplasty (PTCA) 334 (19) 321 2.32 (0.11) 2.49 2.93 (0.04) 2.96 1.16 (0.05) 1.14 $51,215 (1,534) $51,412
54: Other vascular catheterization; not heart 294 (10) 273* 2.04 (0.05) 2.11 8.78 (0.10) 8.88 9.57 (0.20) 9.77 $43,592 (1,041) $42,802
47: Diagnostic cardiac catheterization; coronary arteriography 281 (11) 257 1.95 (0.06) 1.99 4.06 (0.04) 4.07 1.16 (0.06) 1.25 $32,631 (817) $32,111
58: Hemodialysis 254 (8) 234* 1.77 (0.05) 1.81 5.48 (0.06) 5.63* 2.91 (0.09) 2.96 $28,031 (813) $27,913
153: Hip replacement; total and partial 248 (9) 221** 1.72 (0.05) 1.71 5.10 (0.04) 5.11 1.21 (0.06) 1.23 $47,985 (1,089) $46,906
48: Insertion; revision; replacement; removal of cardiac pacemaker or cardioverter/defibrillator 243 (10) 216* 1.69 (0.05) 1.67 4.65 (0.07) 4.79 1.01 (0.05) 1.08 $71,938 (1,720) $73,147
231: Other therapeutic procedures 226 (27) 166* 1.57 (0.18) 1.29 5.59 (0.17) 5.77 5.36 (0.31) 5.61 $26,270 (1,387) $26,545
61: Other OR procedures on vessels other than head and neck 192 (7) 174* 1.33 3529 7.14 (0.15) 7.22 3.65 (0.15) 3.78 $62,148 (1,663) $62,231
146: Treatment; fracture or dislocation of hip and femur 184 (4) 164** 1.28 (0.02) 1.27 6.14 (0.05) 6.17 1.95 (0.08) 2.12* $40,187 (898) $39,672
78: Colorectal resection 140 (4) 123** 0.97 (0.01) 0.95 10.76 (0.09) 10.91 5.78 (0.16) 6.03 $71,303 (1,534) $71,806
76: Colonoscopy and biopsy 138 (3) 122** 0.96 (0.01) 0.94 5.85 (0.05) 5.89 1.06 (0.06) 1.08 $27,685 (707) $26,816
193: Diagnostic ultrasound of heart (echocardiogram) 137 (15) 125 0.95 (0.10) 0.97 5.14 (0.09) 5.14 2.18 (0.13) 2.11 $26,920 (1,547) $25,190
84: Cholecystectomy and common duct exploration 124 (3) 114** 0.86 (0.01) 0.88 6.23 (0.06) 6.28 1.56 (0.08) 1.55 $43,840 (943) $43,333
39: Incision of pleura; thoracentesis; chest drainage 111 (2) 99** 0.77 (0.01) 0.77 7.86 (0.07) 7.93 7.02 (0.19) 6.90 $38,050 (991) $37,726
44: Coronary artery bypass graft (CABG) 102 (6) 97 0.70 (0.03) 0.75 10.19 (0.14) 10.06 2.67 (0.12) 2.73 117,412 (3,762) 115,644
158: Spinal fusion 100 (5) 103 0.70 (0.03) 0.80** 4.63 (0.10) 4.61 0.49 (0.05) 0.52 $79,688 (2,419) $76,626
169: Debridement of wound; infection or burn 95 (2) 90 0.66 (0.01) 0.70* 11.75 (0.29) 12.28 3.86 (0.20) 4.15 $55,523 (2,032) $56,069
213: Physical therapy exercises; manipulation; and other procedures 93 (12) 82 0.65 (0.08) 0.63 11.35 (0.51) 11.67 0.88 (0.16) 0.47* $28,505 (2,080) $33,237*
37: Diagnostic bronchoscopy and biopsy of bronchus 85 (3) 79 0.59 (0.01) 0.61 8.98 (0.11) 8.98 5.34 (0.21) 5.39 $48,471 (1,524) $47,726
51: Endarterectomy; vessel of head and neck 84 (3) 71** 0.58 (0.02) 0.55 2.60 (0.06) 2.65 0.40 (0.04) 0.35 $28,678 (871) $28,046
3: Laminectomy; excision intervertebral disc 82 (4) 77 0.57 (0.02) 0.59 3.33 (0.07) 3.28 0.33 (0.05) 0.28 $29,741 (1,090) $28,353

*Significant at p<0.05.
**Significant at p<0.01.

 

Return to Contents

 

References

National Center for Health Statistics (2010). National Hospital Discharge Survey 2007 Public Use Data File Documentation. Washington, DC: U.S. Department of Health and Human Services, National Center for Health Statistics. ftp://ftp.cdc.gov/pub/Health_Statistics/NCHS/Dataset_Documentation/NHDS/ (Accessed April 28, 2010).

U.S. Agency for Healthcare Research and Quality (2010). Introduction to the NIS, 2007. Rockville, MD. http://www.hcup-us.ahrq.gov/db/nation/nis/NIS_2007_INTRODUCTION.pdf (Accessed May 6, 2010).

U.S. Census Bureau (2007). Cumulative Estimates of Population Change for the United States, States, and Puerto Rico - April 1, 2000 to July 1, 2007. Washington, DC: U.S. Bureau of the Census (2010).

The Henry J. Kaiser Family Foundation (2010), Medicare Advantage Plans – Eligibility and Enrollment (MA_c1.tab). http://healthplantracker.kff.org/rawdata.jsp Exit Disclaimer (Accessed May 14, 2010).

 

Return to Contents

 


Internet Citation: HCUP NIS 2007 NIS Comparison Report. Healthcare Cost and Utilization Project (HCUP). May 2016. Agency for Healthcare Research and Quality, Rockville, MD. www.hcup-us.ahrq.gov/db/nation/nis/reports/2007niscomparisonrpt.jsp.
Are you having problems viewing or printing pages on this Website?
If you have comments, suggestions, and/or questions, please contact hcup@ahrq.gov.
Privacy Notice, Viewers & Players
Last modified 5/27/16