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

Table 4

Correlation of actigraphy and paper diary data ().

	Actigraphy; mean (sd)	Paper diary; mean (sd)	Pearson’s
SL (minutes)	29 (19)	18 (19)	.15
WASO (minutes)	66 (28)	4 (6)	.22
NWAK	52 (14)	1.5 (1)	−.15
TST (minutes)	398 (58)	412 (97)	.39
SE (%)	83 (6)	90 (.1)	.05

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