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Cumulative distribution of the clock time for start of the nighttime period by self-report (Panel A) and actigraphy (Panel B) on ambulatory blood pressure monitoring period 1.
The earliest and latest sleep onset clock times were 12:00 and 04:20 for self-report (median: 23:45) and 12:46 and 07:12 (median: 00:10) using actigraphy, respectively.
