Country differences in nocturnal sleep variability: Observations from a large-scale, long-term sleep

Valuable longitudinal cross-cultural information about sleep patterns can be derived from harnessing these devices at scale. Sleep in East Asians, beyond being merely shorter in duration, is less efficient and more variable, particularly on weekdays. Asians have less sleep extension over weekends. Significant differences in work culture may be driving these differences rather than biology or latitude differences.