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KID Description of Data Elements
The KID is set of longitudinal hospital inpatient databases included in the HCUP family. These databases are created by AHRQ through a Federal-State-Industry partnership.
FEMALE - Indicator of sex
Documentation Sections:
General Notes
Uniform Values
State Specific Notes
General Notes

The sex of the patient (FEMALE) is provided by the data source. All non-male, non-female (e.g., "other") values are set to missing (.).

If FEMALE is inconsistent with diagnoses (EDX03) or procedures (EPR03), FEMALE is set to inconsistent (.C).

In HCUP databases before 1998, this data element is called SEX.

Uniform Values
VariableDescriptionValueValue Description
FEMALEIndicator of sex0Male
.CInconsistent, EDX03, EPR03
State Specific Notes


Central Distributor only - because of confidentiality restrictions, gender (FEMALE) is suppressed on some records.


According to the documentation available from the source, "Other/Unknown" includes patients undergoing sex changes, undetermined sex, live births with congenital abnormalities, and patients whose sex was unavailable from any source document. The source value for "Other/Unknown" was recoded to missing (.), during HCUP processing of 1988-1992 discharges.

From 1993 - 2002, "Other/Unknown" was recoded to invalid (.A) during HCUP processing. From 2003 - 2007 "Other/Unknown" was recoded to missing (.). Beginning in 2008, "Other/Unknown" was once again recoded to invalid (.A)


Through the 2002 data year, the source value "E" for "Encrypted patient gender (confidential data)" is recoded to missing (FEMALE = .).

Utah encrypts the patient gender for the following two conditions:

  1. Patients with the Major Diagnosis Code of "Human Immunodeficiency Virus Infection" (value 25) and
  2. Diagnosis Related Groups "Alcohol/Drug Abuse or Dependence" (values 433-437).

Beginning with the 2003 data, Utah supplies an unmasked file.


Internet Citation: HCUP KID Description of Data Elements. Healthcare Cost and Utilization Project (HCUP). September 2008. Agency for Healthcare Research and Quality, Rockville, MD.
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Last modified 9/17/08