No abstract

This study investigated the sleep-wake rhythm and chronotype of people living in Côte d'Ivoire . We assessed sleep-wake behaviour in 556 adults (336 men, 220 women) between 25 and 54 years (mean: 38 .63) by means of structured interviews . Data were analysed by linear models with sleep wake variables as dependent variables and age, gender, religion and region (urban/rural) as fixed factors controlling for number of working hours and children . Results suggest sleep length not to differ between weekdays and weekends but sleep timing (chronotype) was later on weekends with a midpoint of sleep at 1:37am during weekdays compared to 1:58am on weekends . The more children, the earlier was the midpoint of sleep and the shorter was sleep length . Midpoint of sleep was earlier in older people . Women slept longer during weekdays and were earlier chronotypes . Sleep duration was longer in the rural areas and midpoint of sleep was later in the urban areas on weekdays and on the weekend . Muslims showed the shortest sleep duration and were earliest chronotypes . Sleep-wake cycles in the African setting sample were shorter for women, Moslems, and older people .