The role of psychological mechanisms to insomnia in its early phase: a focus on arousal, distress, and sleep-related beliefs.


The aim of this study was to investigate whether arousal, distress, and sleep-related beliefs are related to the development of insomnia. From a randomly selected sample of 3600 individuals from the general population (50-60 years), 2239 participants filled out a baseline and 1-year follow-up questionnaire. Logistic regression and cluster analysis were used… (More)
DOI: 10.1080/14768320701302791


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