Socio-demographic factors		<1	1 - 2	>3	p-value
Age	Younger (Years 6 - 7)	61	46	66	0.053
Age	Older (Years 8 - 9 + 1)	39	54	34	0.053
Gender	Boys	53	61	67	0.345
	Girls	47	39	33
Birth country	Sweden	84	80	82	0.798
Birth country	Other country	16	20	18	0.798
Mother’s birth country	Sweden	4	9	7	0.534
Mother’s birth country	Other country	96	91	93	0.534
Father’s birth country	Sweden	4	10	2	0.223
Father’s birth country	Other country	96	90	98	0.223
Lives with both parents	Yes	93	85	86	0.327
all the time	No	7	15	14
Type of housing	Rented apartment	34	77	70	<0.001
	Owned residence or both	66	23	30
Mother’s employment	Working	72	66	58	0.347
	Other	28	34	42
Father’s employment	Working	96	83	69	0.003
	Other	4	17	31
Perceived economic status	Worse/much worse than friends	2	9	9	0.343
	About equal to friends	58	49	59
	Better/much better than friends	40	42	32
Has a smartphone	Yes	75	70	59	0.220
	No	25	30	41
Hashis/her own room	Yes	64	57	55	0.593
	No	36	43	45
Health-related factors
Feels safe in neighborhood (daytime)	Strongly agree/Agree	88	88	88	0.998
in daytime	Disagree/Strongly disagree	12	12	12
Feels safe in neighborhood	Strongly agree/Agree	71	82	83	0.307
in evenings	Disagree/Strongly disagree	29	18	17
Self-perceived health	Neither good nor bad, or not good	11	7	2	0.009
	Feeling well	34	16	11
	Feeling very well	55	77	86
Enjoy school	Very/Pretty good	93	96	95	0.671
	Neither good nor bad or pretty/very bad	7	4	5