Table 2.

Mental health among LBC (n=5114) after stratification by demographic characteristics and life experience.

Variable	Anxiety symptoms		p-value	Depressive symptoms		p-value	Self-injurious behavior		p-value
	n(yes)	%		n(yes)	%		n(yes)	%
	1225	24.0		1428	27.9		907	17.7
Gender
Male	553	21.5	<0.001	640	24.8	<0.001	375	14.6	<0.001
Female	672	26.5		788	31.1		532	21.0
Grade
High school	545	25.9	<0.001	711	33.7	<0.001	464	22.0	<0.001
Junior high school	453	26.0		479	27.5		294	16.9
Primary school	146	15.0		135	13.9		70	7.2
Vocational school	81	27.9		103	35.5		79	27.2
LBC Caregivers
Brother or sister	35	31.8	0.046	37	33.6	0.011	23	20.9	<0.001
Father	63	26.7		59	25.0		63	26.7
Grandparents	816	23.5		941	27.1		568	16.4
Mother	207	24.4		247	29.1		149	17.5
Other close relatives	77	20.9		109	29.5		84	22.8
Others	27	33.8		35	43.8		20	25.0
Smoking history
No	1185	23.7	0.032	1377	27.6	0.001	843	16.9	<0.001
Yes	40	32.5		51	41.5		64	52.0
Verbal bullying
Seldom	882	19.8	<0.001	1024	23.0	<0.001	661	14.9	<0.001
Often	343	51.4		404	60.6		246	36.9
Physical bullying
Seldom	1021	21.6	<0.001	1192	25.2	<0.001	759	16.0	<0.001
Often	204	54.1		236	62.6		148	39.3
Relational bullying
Seldom	970	21.0	<0.001	1127	24.4	<0.001	717	15.5	<0.001
Often	255	52.5		301	61.9		190	39.1
Cyber bullying
Seldom	1119	22.7	<0.001	1288	26.2	<0.001	812	16.5	<0.001
Often	106	54.6		140	72.2		95	49.0
Any bullying
Seldom	818	19.1	<0.001	948	22.1	<0.001	613	14.3	<0.001
Often	407	48.9		480	57.7		294	35.3
Teacher-student relationship
Good	1091	23.0	<0.001	1265	26.7	<0.001	786	16.6	<0.001
Poor	134	36.2		163	44.1		121	32.7
Peer relations
Good	1100	23.0	<0.001	1272	26.6	<0.001	805	16.8	<0.001
Poor	125	37.9		156	47.3		102	30.9
Family function
High	348	15.0	<0.001	362	15.6	<0.001	229	9.9	<0.001
Low	82	51.3		112	70.0		77	48.1
Medium	795	30.1		954	36.2		601	22.8