Apparent change in caseness in longitudinal studies

Rob Selzer, John B. Carlin

Research output: Contribution to journalArticleResearchpeer-review

1 Citation (Scopus)


Unless positive responses are verified at a second stage of data collection, a questionnaire-based survey has limited ability to assess change in caseness in a longitudinal study of a condition of low prevalence, assuming imperfect validity of the survey instrument.

Original languageEnglish
Pages (from-to)237-240
Number of pages4
JournalPsychological Medicine
Issue number1
Publication statusPublished - Jan 1997
Externally publishedYes

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