Table 3.

Intraclass correlations between actigraphy and polysomnography.

Sleep parameters	ICC
SL	0.795
WASO	0.731
TST	0.850
SE	0.689

ICC ranges from 0 (no agreement) to 1 (perfect agreement). ICC < 0.5 indicates poor agreement, 0.5 < ICC > 0.75 indicates moderate agreement, 0.75 < ICC > 0.9 indicates good agreement, and ICC > 0.90 indicates perfect agreement (29). ICC, Intraclass correlation coefficient; SL, sleep latency; WASO, wake after sleep onset; TST, total sleep time; SE, sleep efficiency.