• Maria Teresa Anselmo Olinto, Anderson Garcez, Ruth Liane Henn, Jamile Block Araldi Macagnan, Vera Maria Vieira Paniz, and Marcos Pascoal Pattussi.
• Post-graduate Program in Collective Health, University of Vale do Rio dos Sinos, São Leopoldo, RS, Brazil; Department of Nutrition, Federal University of Health Science of Porto Alegre, Porto Alegre, RS, Brazil. Electronic address: mtolinto@gmail.com.
• Psychiatry Res. 2017 Nov 1; 257: 412-417.

AbstractThe aim of this study was to explore the association between sleep-related problems with the occurrence of minor psychiatric disorders in shift workers of southern Brazil. A cross-sectional study with 1202 workers (785 females) aged 18-50 years was carried out. Minor psychiatric disorders were assessed using the Self-Reporting Questionnaire (SRQ-20), and four sleep problems were collected and analyzed: sleep deprivation (≤ 5h), difficulty falling asleep, waking up during sleep, and sleep medication use. Results show that the overall prevalence of minor psychiatric disorders was 26.8%, but it was more prevalent among females than males (30.2% vs. 20.4%). Nightshift work was significantly associated with the occurrence of sleep-related problems. After adjusting for confounding factors, the number of sleep-related problems showed a positive linear trend with psychiatric disorders in both sexes. Having two or more sleep-related problems was associated with increased probability of psychiatric disorders approximately three-fold among males and two-fold among females, when compared with those without sleep problems. In conclusion, this study demonstrated that sleep-related problems have a strong and independent association with psychiatric disorders among shift workers. Furthermore, the prevalence of both conditions was higher among females than males; however, the strength of these associations was higher in males.Copyright © 2017 Elsevier B.V. All rights reserved.

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