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The extreme lack of daylight in December and January taken into consideration, the prevalence of mental distress found, 14% in men and 19% in women, is remarkably low compared with previous epidemiologic research. Except for insomnia in women, which was most prevalent in December, no significant relationship between month of survey and any of the 3 symptoms were found. Thus, the findings cast some doubt upon the importance of daylight for mental distress in the general population.<\/jats:p>","DOI":"10.1111\/j.1600-0447.1991.tb03117.x","type":"journal-article","created":{"date-parts":[[2007,8,23]],"date-time":"2007-08-23T12:16:37Z","timestamp":1187871397000},"page":"137-141","source":"Crossref","is-referenced-by-count":36,"title":["Mental distress during winter. An epidemiologic study of 7759 adults north of Arctic Circle"],"prefix":"10.1111","volume":"84","author":[{"given":"V.","family":"Hansen","sequence":"first","affiliation":[]},{"given":"B. 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