Sleep Duration and Sleep Quality following Acute Mild Traumatic Brain Injury: A Propensity Score Analysis

Table 2

Numbers (percentages) of participants with each PSQI subscore in the mTBI and control groups.

PSQI		Number (%)		value
		mTBI	Control
Sleep duration	>7 h	92 (54)	74 (51)	0.44
	6-7 h	34 (20)	47 (32)
	5-6 h	28 (16)	12 (8)
	<5 h	17 (10)	12 (8)
Sleep disturbance	None	6 (4)	8 (6)	<0.01
	1–9	99 (58)	111 (77)
	10–18	57 (33)	23 (16)
	19–27	9 (5)	3 (2)
Sleep latency	<15 min and not during the previous month	43 (25)	35 (24)	0.10
	16–30 min and less than once/wk	59 (35)	67 (46)
	31–60 min and once or twice/wk	45 (26)	34 (23)
	>60 min and >3 times/wk	24 (14)	9 (6)
Daytime dysfunction	No problems	43 (25)	54 (37)	0.07
	Minor problems	94 (55)	65 (45)
	Considerable problems	26 (15)	22 (15)
	Major problems	8 (5)	4 (3)
Habitual sleep efficiency	≥85%	106 (62)	110 (76)	0.01
	75%–84%	33 (19)	20 (14)
	65%–74%	11 (6)	4 (3)
	<65%	21 (12)	11 (8)
Subjective sleep quality	Very good	11 (6)	27 (19)	<0.01
	Relatively good	55 (32)	73 (50)
	Relatively poor	78 (46)	34 (23)
	Very poor	27 (16)	11 (8)
Use of sleep medication	Never during the previous month	148 (87)	130 (90)	0.14
	Less than once/wk	6 (4)	7 (5)
	Once or twice/wk	2 (1)	3 (2)
	≥3 times/wk	15 (9)	5 (3)