Author(s): Schneider ML, Vasconcellos DC, Dantas G, Levandovski R, Caumo W,
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Abstract Morningness-eveningness dimension in humans have been indicated to influence social behavior and individual health. The aim of the present study was to investigate the association of the morningness-eveningness dimension with behavioral and health aspects in a sample of undergraduate students. We assessed demographic data; the Pittsburgh Sleep Quality Index was used to evaluate sleep quality; the Morningness/Eveningness Questionnaire to determine morningness-eveningness, and the Self-Reporting Questionnaire to assess minor psychiatric disorders. A total of 372 students (66.7\% females), on average 21.6 years old, participated in this study. Among them, 92.2\% did not smoke, 58.9\% engaged in physical activities, and 19.7\% were night-shift workers. In regard to morningness-eveningness, 55.9\% of the participants were intermediate between evening (39.5\%) and morning (4.6\%) types. Poor sleep quality (OR = 1.89), minor psychiatric disorders (OR = 1.92), and tobacco consumption (OR = 3.65) predominated among evening types. Evening types were predominantly males (OR = 1.72). This study suggests that evening types are more vulnerable to sleep and psychiatric disturbances, and tend to smoke more than morning types.
This article was published in Int J Psychol
and referenced in Journal of Sleep Disorders & Therapy