Sleep duration and chronotype in adults in Côte d'Ivoire: influence of gender, religion and age

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 .

Morningness–eveningness is not associated with academic performance in the afternoon school shift: Preliminary findings

“…However, previous research has shown that latitude or the distance to the equator has a significant influence on chronotype because people near the equator live in a stable light–dark cycle throughout the year (Borchers, Ouattara, Vollmer, & Randler, ). Several studies have reported that students in warm climates (Mexico, Colombia, Guatemala, Brazil, Costa Rica, Philippines, and India) perceived themselves to be more morning oriented than students who lived in less warm climates (United States, England, the Netherlands, Russia, Sweden, Germany, and Ireland) (Arrona‐Palacios & Díaz‐Morales, ; Nag & Pradhan, ; Randler, ; Smith et al ., ).…”

Chronotype, Sleep Behavior, and the Big Five Personality Factors

“…Assume a person, who gets up at 6:00 and goes to bed at 24:00, has the same sleep duration as a person going to bed at 22:00 and waking up at 4:00. Comparable to chronotype, sleep duration decreases with age, and there are gender differences with women sleeping longer than men do (see, e.g., Borchers, Ouattara, Vollmer, & Randler, 2015). Most people sleep longer on weekends compared with weekdays (Roenneberg et al, 2007).…”

Godless owls, devout larks: Religiosity and conscientiousness are associated with morning preference and (partly) explain its effects on life satisfaction

“…In all models, age and gender were included as covariates since previous studies report that they are associated with chronotype [ 38 ] and satisfaction with life [ 39 ] as well as with religiosity [ 40 , 41 ].…”