Table 2.

Descriptive statistics of the objective actigraphy sleep parameters in the whole dataset

Actigraphy sleep parameters	Median	Quartiles (Q1, Q3)	Range (min, max)	Average	SD
Time of retiring	23:07	22:11, 23:54	19:29, 05:00	23:04	1:21
Sleep midpoint	3:29	2:50, 4:09	00:38, 10:19	3:32	1:01
Time of waking up	8:00	7:14, 8:46	3:49, 15:39	8:00	1:14
Total sleep time	7 h 50 min	6 h 50 min, 8 h 44 min	1 h 1 min, 13 h 7 min	7 h 45 min	1 h 42 min
Sleep efficiency	92.0%	86.7%, 95.0%	20.2%, 100%	88.8%	10.6%
Sleep onset latency	5 min	0 min, 7 min	0 min, 50 min	5 min	5 min
Latency to persistent sleep	6 min	0 min, 12 min	0 min, 10 h 25 min	15 min	42 min
Wake after sleep onset	42 min	25 min, 1 h 10 min	0 min, 6 h 54 min	57 min	53 min
Sleep fragmentation index	2.4%	0.1%, 3.6%	0.1%, 28.8%	3.0%	2.7%
Short burst inactivity index	33	0, 41	0, 73	34	13
Total time in bed	8 h 50 min	4 h 57 min, 9 h 51 min	4 h 57 min, 17 h 22 min	8 h 56 min	1 h 34 min
Wake minutes	52 min	2 min, 81 min	2 min, 11 h 9 min	1 h 12 min	1 h 11 min
Wake episodes	11	1, 17	1, 58	13	7
Mean duration of wake episodes	5 min	1 min, 7 min	1 min, 37 min	6 min	4 min
Wake episodes ≥5 min	4	0, 5	0, 32	4	4
Longest wake episode	17 min	1 min, 26 min	1 min, 3 h 19 min	22 min	20 min
Sleep episodes	11	1, 16	1, 57	12	7
Mean duration of sleep episodes	44 min	4 min, 1 h 5 min	4 min, 12 h 58 min	57 min	1 h 3 min
Sleep episodes ≥5 min	8	1, 11	1, 30	9	4
Longest sleep episode	2 h 32 min	13 min, 3 h 33 min	13 min, 12 h 58 min	2 h 49 min	1 h 32 min