Optimizing measurement of self-reported adherence with the ACTG Adherence Questionnaire: a cross-protocol analysis.

Abstract

BACKGROUND/OBJECTIVE The AIDS Clinical Trials Group (ACTG) Adherence Questionnaire is used extensively, but investigators frequently only use the first item of the questionnaire (4-day recall). DESIGN/METHODS A secondary analysis was conducted to (1) estimate the validity and reliability of each of the 5 scale items and (2) compare the approach commonly… (More)

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