Extended Data Fig. 4: Sleep parameters sorted by students’ first class of the day.
From: Early morning university classes are associated with impaired sleep and academic performance
a–c, The distribution of individual values for actigraphically-determined (a) sleep onset, (b) sleep offset and (c) total sleep time are shown for different class start times (no. of independent students for each class start time: 08:00, n = 103; 09:00, n = 61; 10:00, n = 123; 11:00, n = 35; 12:00, n = 107; 14:00, n = 71; 16:00, n = 44). Circles indicate the median sleep value for an individual student for a given class start time. Gray lines connect data for the same individual to illustrate within-participant differences for school days versus non-school days. Box plots show the distribution of sleep values in each group of students for a given class start time. Boxes show the median and interquartile range. Whiskers show the 10th and 90th percentiles.
