Sleep in relation to psychiatric symptoms and perceived stress in Swedish adolescents aged 15 to 19 years

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| 14 feb 2020

INFORMAZIONI SU QUESTO ARTICOLO

Cita

		Total	Female	Male	Missing data on sex	p-value between sexes
Minutes of sleep per night	mean (CI 95%)	492 (484-500)	495 (485-505)	483 (467-498)		0.11
	SD	57.4	59.2	54.5
	range	330-810	330-810	385-615
	n	198	139	49	10
	n < 8h	54	35	17	2	0.2
	% < 8h	27%	25%	35%
Problems staying awake	n never	79	55	22	2
	n less than 1 time/week	65	46	15	4
	n 1 to 2 times/week	38	26	9	3
	n 3 or more times/week	18	14	3	1
	n > 1 to 2 times/week	56	40	12	4	0.6
	n total	200	141	49	10
	% > 1 to 2 times/week	28%	28.4%	24.5%

Item from PSQI Subscale Sleep Disturbance		Female	Male	p-value between sexes
No sleep in 30 min	mean	1.47	1.27	0.143
	CI 95 %	(1.27-1.66)	(0.97-1.56)
	n	141	49
Nightly wakening	n	141	49
	mean	1.10	0.53	0.0003
	CI 95 %	(0.93-1.27)	(0.3-0.76)
Toilet visits	mean	0.65	0.41	0.0491
	CI 95 %	(0.50-0.81)	(0.2-0.62)
	n	141	49
Breathing difficulties	mean	0.2	0.22	0.6116
	CI 95 %	(0.11-0.28)	(0.03-0.42)
	n	141	49
Snoring/coughing	mean	0.25	0.14	0.1394
	CI 95 %	(0.15-0.35)	(-0.01-0.3)
	n	141	49
Feeling cold	mean	1.0	0.5	0.0006
	CI 95 %	(0.88-1.23)	(0.28-0.74)
	n	140	49
Feeling hot	n	139	48
	mean	0.93	0.63	0.0297
	CI 95 %	(0.76-1.09)	(0.38-0.87)
Unpleasant dreams	mean	0.81	0.23	<0.001
	CI 95 %	(0.66-0.97)	(0.08-0.38)
	n	139	48
Ache	mean	0.33	0.1	0.0241
	CI 95 %	(0.21-0.45)	(0.01-0.23)
	n	139	49
Other	mean	0.59	0.5	0.2781
	CI 95 %	(0.44-0.75)	(0.21-0.79)
	n	138	48

Subscales of PSQI		Total	Female	Male	Missing data on sex	p-value between sexes
Sleep quality	mean	1.27	1.28	1.18		p = 0.20
	CI 95%	(1.17-1.37)	(1.17-1.40)	(0.96-1.41)
	n	200	141	49	10
Sleep latency	mean	1.5	1.53	1.37		p = 0.17
	CI 95%	(1.35-1.65)	(1.35-1.71)	(1.10-1.63)
	n	200	141	49	10
Sleep duration	mean	0.82	0.8	0.82		p = 0.55
	CI 95%	(0.72-0.92)	(0.68-0.92)	(0.59-1.04)
	n	202	141	49	12
Habitual sleep efficiency	mean	0.39	0.36	0.42		p = 0.68
	Cl 95%	(0.28-0.49)	(0.24-0.48)	(0.2-0.63)
	n	199	139	48	12
Sleep disturbance	mean	1.08	1.14	0.91		p= 0.0020
	CI 95%	(1.01-1.15)	(1.06-1.22)	(0.79-1.04)
	n	188	132	46	10
Use of sleeping medication	mean	0.11	0.09	0.1		p = 0.55
	Cl 95%	(0.05-0.18)	(0.02-0.16)	(-0.02-0.22)
	n	200	141	49	10
	n using	13	8	3	2
Daytime dysfunction	mean	1.54	1.54	1.43		p = 0.19
	CI 95%	(1.43-1.64)	(1.41-1.66)	(1.21-1.65)
	n	200	141	49	10
	n affected	187	133	44
	% affected	93.5%	94.3%	89.8%

Scales	All			Female			Male
	ρ	n	p-value	ρ	n	p-value	ρ	n	p-value
PSQI–GSI	0.4393	179	< 0.0001	0.4137	129	< 0.0001	0.4375	44	0.0030
PSQI–PSS	0.4802	166	< 0.0001	0.4437	122	< 0.0001	0.6032	40	< 0.0001

PSQI	Total^a	Female^b	Male^b	Missing data on sex	p-value between sexes
n	185	130	45	10
Mean score CI 95%	6.70 (6.30-7.20)	6.72 (6.23-7.21)	6.31 (5.41-7.21)		p = 0.20
n > score 5	140	99	32		p = 0.50
% > score 5	76%	76%	71%
p-value mean score>score 5	p< 0.0001	p< 0.0001	p= 0.0026