Tehran University of Medical Sciences Journal of Sleep Sciences 2476-2938 2 3-4 2018 08 04 71 74 EN Zahra Banafsheh Alemohammad Occupational Sleep Research Center, Baharloo Hospital, Tehran University of Medical Sciences, Tehran, Iran Omid Aminian Department of Occupational Medicine, School of Medicine, Tehran University of Medical Sciences, Tehran, Ira Anoosheh Noorani Center for Research on Occupational Diseases, Tehran University of Medical Sciences, Tehran, Iran Khosro Sadeghniiat-Haghighi Occupational Sleep Research Center, Baharloo Hospital, Tehran University of Medical Sciences, Tehran, Iran Sahar Eftekhari Occupational Sleep Research Center, Baharloo Hospital, Tehran University of Medical Sciences, Tehran, Iran 2017 08 12 2017 08 20 Background and Objective: Obstructive sleep apnea (OSA) is associated with increased sympathetic activity, sleepiness, mood, and psychological alterations. In this study, mood and psychological state of patients referring to sleep laboratory were assessed. Materials and Methods: Fifty-eight consecutive individuals eligible for participation in the study were assigned to one of two groups of normal and mild (n = 19), or moderate to severe OSA (n = 39) with apnea-hypopnea index (AHI) of ≤ 15, or > 15 per hour, respectively, based on their initial polysomnography. The mood status was evaluated using the profile of mood states (POMS). Results: Amongst the six POMS subscales, only power-energy was significantly different between the two groups (P = 0.03). The total score of POMS, however, did not differ across the groups (P = 0.58). Conclusion: According to the obtained results, it may be concluded that mood status and OSA are not related when POMS is used for evaluation of mood status https://jss.tums.ac.ir/index.php/jss/article/view/73 https://jss.tums.ac.ir/index.php/jss/article/download/73/84