✦ LIBER ✦

Tests If Dropouts Are Missed at Random

✍ Scribed by Joachim Listing; Rainer Schlittgen

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 125 KB
Volume: 40
Category: Article
ISSN: 0323-3847
DOI: 10.1002/(sici)1521-4036(199812)40:8<929::aid-bimj929>3.0.co;2-x

No coin nor oath required. For personal study only.

✦ Synopsis

Dropouts are a common problem in longitudinal investigations where individuals are measured repeatedly over time. This holds also in a study on rheumatoid arthritis where an inception cohort was followed up over three years. The question arose whether or not these individuals caused a selection bias. Two tests taken from the literature could be used to answer this question. But since they do not use all available information, a new asymptotic test is proposed. In a small simulation study it is shown that the new test is more powerful than the others.

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