Fig. 1

Accelerometry-derived sleep-quantity and -quality measures across days of the week. a Nocturnal sleep time (minutes); b Total sleep time (minutes); c Number of awakenings; d Wake after sleep onset (minutes); e Activity counts during sleep time; f Sleep efficiency (percentage). The day-by-day sleep indices are presented using violin plots (medium smoothing). The horizontal lines above the day of the week indicate significant post hoc differences (Tukey procedure) between days at either end of the line