Author(s): Lu M, Safren SA, Skolnik PR, Rogers WH, Coady W,
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Abstract Self-reported measures of antiretroviral adherence vary greatly in recall time periods and response tasks. To determine which time frame is most accurate, we compared 3-, 7-day, and 1-month self-reports with data from medication event monitoring system (MEMS). To determine which response task is most accurate we compared three different 1-month self-report tasks (frequency, percent, and rating) to MEMS. We analyzed 643 study visits made by 156 participants. Over-reporting (self-report minus MEMS) was significantly less for the 1-month recall period (9\%) than for the 3 (17\%) or 7-day (14\%) periods. Over-reporting was significantly less for the 1-month rating task (3\%) than for the 1-month frequency and percent tasks (both 12\%). We conclude that 1-month recall periods may be more accurate than 3- or 7-day periods, and that items that ask respondents to rate their adherence may be more accurate than those that ask about frequencies or percents.
This article was published in AIDS Behav
and referenced in Journal of Addiction Research & Therapy