JSM 2004 - Toronto

Abstract #301094

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Activity Number: 293
Type: Topic Contributed
Date/Time: Wednesday, August 11, 2004 : 8:30 AM to 10:20 AM
Sponsor: Section on Government Statistics
Abstract - #301094
Title: Weighting and Sample Design Issues in the NHIS-NDI Linked File
Author(s): Wenxing Zha*+ and Myron Katzoff
Companies: National Center for Health Statistics and National Center for Health Statistics
Address: 3311 Toledo Rd., Hyattsville, MD, 20782,
Keywords: mortality ; National Health Interview Survey ; weighting ; sample design ; record linkage ; National Death Index
Abstract:

Both refusal of permission to link the NHIS with the NDI (and other administrative files) and the conservative results of the record linkage change the nature of the sample from the original sample design. In addition, many users aggregate multiple years of data to accumulate enough cases for analysis. However, the NHIS underwent a change in sample design between 1994 and 1995, and stacking the 1995-2000 years with the 1986-1994 years may yield incorrect variance estimates. Lack of permission to match, insufficient data to match, and missed matches result in record nonresponse. We compare observed mortality from the NHIS-NDI linkage to projected mortality rates from period and cohort life tables, and consider the bias in estimates.

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