Abstract
Abstract Studies report that subjective and objective sleep parameters often do not agree with each other. This study examined if discordance between subjective and objective sleep measures are associated with cognition. Participants from the Midlife in the United States study (n=627) provided subjective (self-report) and objective (actigraphy) sleep duration and sleep quality. Discordance was assessed by absolute difference between subjective and objective z-scores in each sleep variable. Cognitive function was measured by the Brief Test of Adult Cognition by Telephone (BTACT). The correlations between subjective and objective sleep measures were weak-to-moderate (r=.43, .18 for duration and quality, respectively). Discordance scores in sleep duration and quality were each significantly associated with BTACT, such that greater discrepancy was associated with poorer cognitive function. These associations remained persistent after adjusting for sociodemographic differences. Results suggest that discordance between subjective and objective sleep parameters may relate to cognitive abilities needed to accurately monitor sleep characteristics.
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