Trend Weights for 1988-1997 HCUP NIS Data Beginning in 1998, NIS weights calculations were changed in order to make national estimates of the number of discharges more accurate:
The alternate weights are available as ASCII files along with SAS and SPSS load programs. Each file contains the following three data elements:
Alternative NIS Weights files for download:
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Internet Citation: HCUP NIS Trend Weights. Healthcare Cost and Utilization Project (HCUP). February 2011. Agency for Healthcare Research and Quality, Rockville, MD. www.hcup-us.ahrq.gov/db/nation/nis/trendwghts.jsp. |
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Last modified 2/1/11 |