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Public Opin Q. 1984 Spring;48(1B):370-8.

Self-generated identification codes for anonymous collection of longitudinal questionnaire data.

Abstract

The success of a self-generated identification code for linking longitudinal questionnaire data was examined. The matching procedure developed for linking questionnaires, including a simple technique to compensate for nonidentical codes, yielded a high success rate (92% linkage of cases over a one-month interval and 78% over a one-year interval) and very few incorrectly linked cases. The procedure worked equally well with elementary and high school students, and the resulting samples were representative of the student population on a wide range of measures. Some suggestions are offered regarding the elements comprising self-generated codes.

PMID:
10265980
DOI:
10.1093/poq/48.1b.370
[Indexed for MEDLINE]

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