Table 2:

Activity, light, and sleep characteristics derived from actigraphy

	Total (n=67)	Female (n=35)	Male (n=32)
Sleep onset time (hh:min)	23:46±01:09	23:42±01:12	23:50±01:05
Sleep offset time (hh:min)	06:56±01:20	7:10±01:22	6:41±01:17
Sleep duration (hh:min)	06:56±00:53	7:11±00:44	6:39±00:57*
Diurnal motor activity	3.9 × 106 ± 1.2 × 106	3.3 × 106 ± 0.9 × 106	4.7 × 106 ± 1.3 × 106 **
Nocturnal motor activity	3.7 × 104 ± 2.0 × 104	3.5 × 104 ± 1.9 × 104	4.1 × 104 ± 2.1 × 104
Intradaily variability	0.93±0.30	0.97±0.17	0.90±0.40
Interdaily stability	0.60±0.49	0.61±0.49	0.60±0.49
Relative amplitude	0.9764±0.0154	0.9770±0.01573	0.9759±0.01528
Beginning of rest phase	24:47±01:13	24:53±01:24	24:40±00:59
Beginning of active phase	08:39±01:55	08:57±02:00	08:19±01:49
Diurnal light exposure	349.2±747.1	3195.1±602.9	3808.1±763.1**
Total light exposure within 3-hour post sunrise	601.6±654.2	359.1±520.1	877.5±689.2**
Phase angle between DLMO and sleep onset	3:42±1:46	3:16±1:53	4:11±1:31**
Phase angle between DLMO and beginning of rest phase	4:43±1:49	3:25±2:00	5:02±1:33
Phase angle between DLMO and beginning of active phase	11:24±2:26	11:29±2:32	11:18±2:21

Data are presented as mean±SD; GLM:

^**p<0.01.