Figure 2. Participant 2.

(A) Single-raster plot of wrist actigraphy data from all 332 days of study (black denotes movement); hours are along the horizontal axis and days down the vertical axis. Red circles represent the timing of the salivary dim light melatonin onsets (DLMOs). (B–E) Double-raster plots (black bars denote sleep periods) of sleep diary data from selected days of study and highlight the different sleep-wake patterns observed. In (B) there is a non–24-hour sleep-wake schedule with an overall observed sleep-wake period of 24.7 hours (days 56–96). Note however that there was a week (days 74–81) when the observed sleep-wake period was 32.0 hours (black dashed line). The overall sleep-wake period and observed melatonin periods (red dashed line) were both 24.8 hours from days 73 to 95. (C) is an example of an irregular sleep-wake pattern, (D) shows a predominantly 24-hour sleep-wake pattern, and (E) shows again weeks where the observed sleep-wake period exceeded 30 hours (eg, 35.0 hours, days 210–217 and 39.8 hours, days 228–235).