Table 3.

Distribution of prevalence of thinness by sibship size or structure

Variables	Total sample	Grade 1 thinness		Grade 2 thinness		Grade 3 thinness		Total thinness
	N	N	%	N	%	N	%	N	%
Number of siblings
None (only child)	49,097	4884	9.95	1469	2.99	993	2.02	7346	14.96
One	6852	784	11.44	258	3.77	204	2.98	1246	18.18
Two or more	11,625	1128	9.70	423	3.64	478	4.11	2029	17.45
Total	67,574	6796	10.06	2150	3.18	1675	2.48	10,621	15.72
Birth order
Only child	49,097	4884	9.95	1469	2.99	993	2.02	7346	14.96
Oldest child	7941	855	10.77	285	3.59	268	3.37	1408	17.73
Middle	6696	638	9.53	240	3.58	268	4.00	1146	17.11
Youngest child	3162	359	11.35	142	4.49	116	3.67	617	19.51
Missing	678	60	8.85	14	2.06	30	4.42	104	15.34
Total	67,574	6796	10.06	2150	3.18	1675	2.48	10,621	15.72
Number of younger siblings
None (only child)	49,097	4884	9.95	1469	2.99	993	2.02	7346	14.96
One (oldest child)	3691	421	11.41	119	3.22	90	2.44	630	17.07
Two or more (oldest child)	4250	434	10.21	166	3.91	178	4.19	778	18.31
Total	57,038	5739	10.06	1754	3.08	1261	2.21	8754	15.35
Number of older siblings
None (only child)	49,097	4884	9.95	1469	2.99	993	2.02	7346	14.96
One (youngest child)	2968	342	11.52	134	4.51	107	3.61	583	19.64
Two or more (youngest child)	194	17	8.76	8	4.12	9	4.64	34	17.53
Total	52,259	5243	10.03	1611	3.08	1109	2.12	7963	15.24