Socio-demographic factors		N	Boys	Girls	p-value
Age	Younger (Years 6 - 7)	114	55	56	0.932
Age	Older (Years 8 - 9 + 1)	92	45	44	0.932
Birth country	Sweden	172	81	85	0.435
Birth country	Other country	35	19	15	0.435
Mother’s birth country	Sweden	17	5	13	0.053
Mother’s birth country	Other country	178	95	87	0.053
Father’s birth country	Sweden	14	4	12	0.028
Father’s birth country	Other country	175	96	88	0.028
Lives with both parents	Yes	176	87	84	0.569
all the time	No	29	13	16
Type of housing	Rented apartment	122	67	51	0.02
	Owned residence or both	82	33	49
Mother’s employment	Working	125	62	65	0.69
	Other	73	38	35
Father’s employment	Working	158	84	82	0.69
	Other	32	16	18
Perceived economic status	Worse/much worse than friends	13	9	3	0.042
	About equal to friends	114	49	65
	Better/much better than friends	77	43	32
Has a smartphone	Yes	132	67	72	0.466
	No	60	33	28
Hashis/her own room	Yes	122	39	39	0.974
	No	77	61	61
Health-related factors
Feels safe in neighborhood (daytime)	Strongly agree/Agree	156	83	95	0.021
in daytime	Disagree/Strongly disagree	21	17	5
Feels safe in neighborhood	Strongly agree/Agree	138	77	80	0.602
in evenings	Disagree/Strongly disagree	38	23	20
Self-perceived health	Neither good nor bad, or not good	15	5	11	0.327