Table 1. Participant characteristics and outcomes by DRP group.

	Mean DRP during weekdays (hours)
	<10 (n=28)		10 h–10 h 59 mins (n=55)		11 h–11 h 59 mins (n=137)		12 h–12 h 59 mins (n=253)		13 h–13 h 59 mins (n=379)		14 h–14 h 59 mins (n=542)		15 h–15 h 59 mins (n=349)		≥16 (n=68)
	n	(%)	n	(%)	n	(%)	n	(%)	n	(%)	n	(%)	n	(%)	n	(%)
Sex
Male	27	(96.4)	53	(96.4)	129	(94.2)	233	(92.1)	339	(89.5)	449	(82.8)	272	(77.9)	38	(55.9)
Female	1	(3.6)	2	(3.6)	8	(5.8)	20	(7.9)	40	(10.6)	93	(17.2)	77	(22.1)	30	(44.1)
Age
20–29	2	(7.1)	3	(5.5)	8	(5.8)	11	(4.4)	9	(2.4)	19	(3.5)	19	(5.4)	2	(2.9)
30–39	7	(25.0)	8	(14.6)	31	(22.6)	60	(23.7)	72	(19.0)	117	(21.6)	69	(19.8)	17	(25.0)
40–49	8	(28.6)	22	(40.0)	70	(51.1)	102	(40.3)	166	(43.8)	213	(39.3)	137	(39.3)	22	(32.4)
50–59	10	(35.7)	21	(38.2)	26	(19.0)	74	(29.3)	122	(32.2)	169	(31.2)	96	(27.5)	24	(35.3)
60–64	1	(3.6)	1	(1.8)	2	(1.5)	6	(2.4)	10	(2.6)	24	(4.4)	28	(8.0)	3	(4.4)
Non-restorative sleep (instances per week)
<3	15	(53.6)	27	(49.1)	86	(62.8)	188	(74.3)	272	(71.8)	412	(76.0)	255	(73.1)	50	(73.5)
≥3	13	(46.4)	28	(50.9)	51	(37.2)	65	(25.7)	107	(28.2)	130	(24.0)	94	(26.9)	18	(26.5)
Fatigue (stress symptoms)* (range: 11–44)	26.8	(9.2)	26.5	(9.0)	25.1	(8.6)	22.9	(7.6)	21.9	(7.0)	21.1	(7.5)	20.2	(7.8)	19.9	(7.4)
Work performance* (range: 0–10)	5.9	(2.1)	5.4	(2.1)	5.6	(1.7)	5.8	(1.6)	5.7	(1.8)	5.9	(1.7)	5.8	(1.8)	5.6	(2.0)

Note. N=1,811; *mean (standard deviation); full information for other variables available on request.