How is persistent insomnia maintained? A prospective study on 50-60 years old adults in the general population.

Abstract

OBJECTIVES The purpose of this study was to examine whether arousal, distress and sleep-related beliefs are related to the maintenance of insomnia in old adults. DESIGN From a randomly selected sample from the general population (N=3,600; 50-60 years old), 2,239 participants filled out a baseline and 1-year follow-up survey. METHODS Logistic regressions… (More)

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