Fig. 2From: Investigating the relationship between sleep and migraine in a global sample: a Bayesian cross-sectional approachSleep characteristics according to geographical region for the overall sample. A Mean hours slept according to region, with the shortest sleep duration (6.39Â h) in Western Africa and the longest duration in Melanesia (7.87Â h). B Mean sleep start time according to region. The latest sleep onset time was in Southern Asia (00:55) and the earliest was in Melanesia (22:09)Back to article page