Sleep disturbances, particularly insomnia, are common in school settings for adolescents. They affect the physical and mental balance with multiple consequences: various pain, fatigue, errors, reduced academic performance, drowsiness in class, repeated absences etc. We conducted a cross-sectional study using a questionnaire and the Epworth sleepiness scale with students from schools in the department of Thiès. The prevalence of insomnia was 21%, with a female prevalence. The average duration of sleep was 8.72 ± 1.1 hours with a variation according to the holidays, the days with or without class the next day. Risk factors are found, in particular living with a tutor other than the parents, the distance of the school from his place of residence, and the morning lesson schedules. Insomnia is significantly associated with sleep debt and excessive daytime sleepiness.

Night work in hospitals, despite its many negative psychosomatic, occupational and social repercussions, remains very little evaluated in African countries, and particularly in Senegal. The objective of this study was to evaluate its various repercussions on the health and socio-professional life of workers. For this, we conducted a cross-sectional and descriptive study over a period of 3 months using anonymous questionnaires. Our sample included health professionals performing night watch. A total of 65 had participated in the study. Women accounted for 63%. State nurses were more numerous (44.7%). The average age was 34.2 years old. The average seniority in night work was 7.1 years. 55.4% of workers felt comfortable with this type of schedule, compared with 44.6% feeling disrupted. 74.6% preferred daytime work. Several impacts of night work were identified. They were physiological, with poor sleep quality (48.4%), insufficient sleep duration (42.2%), menstrual disorders (24.7% of women). On the psychological level, stress (52.3%), temperamental disorders (26.5%), anxiety and depression (7.7%) were found. The somatic effects were chronic fatigue (100%), cardiovascular symptoms, weight disorders (46.1%). On a professional level, the nocturnal victims of blood exposure accidents accounted for 36.5%. On the social level, 42.2% reported disruptions in their family life. Thus, regular medical and psychological monitoring of night workers is fundamental.