Afonso P, et al. – A comparative analysis was performed between longer working hours group (LWHG) and regular working hours group (RWHG) in terms of sleep quality and anxiety and depression symptoms. Researchers also assessed factors affecting weekly working hours, sleep quality and anxiety and depressive symptoms in these subjects. As demonstrated in findings, longer working hours were associated with poorer mental health status and increasing levels of anxiety and depression symptoms among study participants. In addition, a positive correlation was apparent, between these symptoms and sleep disturbances.