Calculating KIDS' Inpatient Database (KID) Variances. H-CUP (Healthcare Cost and Utilization Project):Methods Series rept

摘要

The Healthcare Cost and Utilization Project (HCUP) is a Federal-State-Industry partnership to build a standardized, multi-State health data system. The Kids Inpatient Database (KID) is a nationwide sample of pediatric discharges from HCUP State Inpatient Databases (SID) community, non-rehabilitation hospitals weighted to all pediatric discharges in the target universe. The target universe includes all pediatric discharges from community hospitals in the United States that were open during any part of the calendar year. Beginning with the 2000 KID, short-term rehabilitation hospitals were excluded from the universe because the type of care provided and the characteristics of the discharges from these facilities were markedly different from other short-term hospitals. This document describes how to calculate simple statistics, including variances, from the KID, taking into account the sampling design and sample discharge weights. Data from the 2003 KID are used in all examples in this report. The report contains the program code required to calculate sample totals, means, rates, and their variances with three commonly used statistical programming languages that run on personal computers: SAS, Stata, and SUDAAN. This report also provides results of example calculations from all three statistical packages using the 2003 KID, and it demonstrates that the results are virtually identical for all three statistical packages.