| Corrections to the Nationwide Inpatient Sample 1998-1999 | 
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| Incorrect label for region
	 In the 1998 and 1999 Description of Data Elements for the Hospital File, the value 1 for the data element region (HOSP_REGION) is incorrectly specified as "Northwest." Region 1 should be labeled "Northeast." | 
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| Correction to Instruction on How to Calculate Variances (Standard Errors)
	 Click to view the Correction to Instruction on How to Calculate Variances (Standard Errors) (PDF file, 76 KB) | 
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| Internet Citation: HCUP NIS Database Documentation - Corrections. Healthcare Cost and Utilization Project (HCUP). December 2004. Agency for Healthcare Research and Quality, Rockville, MD. hcup-us.ahrq.gov/db/nation/nis/corrections_1998_1999.jsp. | 
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| Last modified 12/13/04 |