Validation of Capturing Sleep Diary Data via a Wrist-Worn Device

Table 2

Diary and actigraphy measures of sleep latency, waking after sleep onset, and number of awakenings during sleep.

	Diary assessments; mean (sd)		Actigraphy measures; mean (sd)
	Paper	Electronic
SL (minutes)	19 (20)	23 (22)	29 (19)
WASO (minutes)	4 (6)	15 (13)	66 (28)
NWAK	1.5 (2)	1.8 (1.4)	52 (14)
TST (minutes)	412 (97)	434 (50)	398 (58)
SE (%)	90 (.1)	92 (.05)	83 (6)

NWAK—number of awakenings during sleep, SL—sleep latency, WASO—waking after sleep onset, SE—sleep efficiency, and TST—total sleep time.