Table 4

Selected indicators for Xiaoshan only by family size and by family position in sibling families; percentages, adjusted odds ratios

	1 child n=759	2+ children n=629	Adjusted OR*	p value	Sibling family 1st child n=358	Sibling family 2nd child n=257	Adjusted OR*	p value
*Adjusted for sex, parental education.
Nutritional indicators
Overweight	0.26	0.19	0.6 (0.2 to 1.2)	0.2	0.17	0.22	0.9 (0.5 to 1.7)	0.8
Underweight	15	17	0.9 (0.6 to 1.4)	0.5	16	18	0.8 (0.4 to 1.4)	0.7
Anaemic	36	38	0.9 (0.7 to 1.3)	0.5	40	37	1.2 (0.6 to 1.7)	0.3
Health care seeking behaviour
Visit to doctor in past year	62	58	0.8 (0.6 to 1.1)	0.08	57	60	0.8 (0.5 to 1.3)	0.4
Visit to dentist in past year	12	6	0.7 (0.3 to 1)	0.06	8	5	1.2 (1 to 1.4)	0.05
Risk behaviours
Ever smoking	20	12	0.6 (0.3 to 1.3)	0.5	7	21	0.8 (0.5 to 1.4)	0.1
Ever drinking alcohol	38	30	0.7 (0.6 to 1)	0.04	26	34	0.7 (0.4 to 1)	0.06
Ever been drunk	16	11	0.7 (0.5 to 1)	0.04	8	17	0.8 (0.6 to 0.9)	0.05
Mental health
Self esteem: high	30	28	0.9 (0.6 to 1.2)	0.7	27	29	0.9 (0.6 to 1.2)	0.7
Anxiety: severe/moderate	35	40	1.2 (0.9 to 1.4)	0.06	46	34	1.2 (0.8 to 1.5)	0.2
Depression: severe/moderate	26	39	1.4 (1.1 to 1.8)	0.03	45	33	1.4 (0.7 to 1.4)	0.3
Have contemplated suicide	14	15	1.1 (0.5 to 1.4)	0.9	17	12	1.1 (0.8 to 1.3)	0.5
Have tried to commit suicide	10	9	0.9 (0.7 to 1.3)	0.9	9	8	1.1 (0.8 to 1.3)	0.6
Social
Bullied sometimes/often	33	48	0.7 (0.5 to 0.8)	0.001	47	50	0.9 (0.7 to 1.2)	0.6
Generally liked by peers	74	65	0.6 (0.5 to 0.8)	0.005	66	64	1.1 (0.8 to 1.3)	0.5
Readily confide in friends	68	64	0.8 (0.6 to 1.0)	0.07	65	62	1.2 (0.8 to 1.4)	0.6
Readily confide in parents/other relatives	66	38	0.3 (0.2 to 0.6)	0.006	34	43	0.7 (0.5 to 0.9)	0.003
Self reported academic record: excellent/good	50	39	0.5 (0.3 to 0.7)	0.002	45	32	1.3 (1.2 to 1.5)	0.004