JSM 2004 - Toronto

Abstract #300835

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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 - #300835
Title: Methodological Improvements in NHIS-NDI Record Linkage
Author(s): Bryan Sayer*+
Companies: Social & Scientific Systems, Inc.
Address: 8757 Georgia Ave, Silver Spring, MD, 20910-3739,
Keywords: record linkage ; probabilistic matching ; mortality ; National Health Interview Survey ; National Death Index
Abstract:

A number of improvements in the record linkage methodology are implemented in the 2003 linkage. These include an expanded use of alternate submission records, more classes of potential matches reflecting a greater refinement of matching characteristics, and improved measures of matching probability. Alternate submission records improve the chance of selecting the correct certificate in the selection process, but may increase the risk of a false positive in the scoring process. We also add several additional scoring measures, including the total possible score, the ratio of the obtained score to the possible score, and model-based estimates of the probability of a match and the probability of a nonmatch. These additional estimates may be used to facilitate an analysis of the sensitivity of score cut-offs in determining mortality status.

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