Table 2.

Sleep Analysis of Healthy Volunteers.

	Wrist	Waist	P value	Correlation coefficient
MAC for the ZCM	19.0±7.5	14.3±6.4	0.097	0.681
MAC for the PIM	319.4±149.9	71.2±34.7	P<0.01	0.762
Sleep efficiency	90.7±5.2	93.2±5.4	0.141	0.541
WASO	35.2±17.2	27.9±18.1	0.150	0.567

MAC, mean active count; ZCM, zero-crossing mode; PIM, proportional-integrating mode; WASO, wake after sleep onset