Table 1. Distribution of controls with respect to anthropometric factors and body size.

	Trivandrum					Chennai
	Urban (n=233)		Rural (n=975)			Urban (n=384)		Rural (n=281)
Factors	N	%	N	%	P-value	N	%	N	%	P-value
BMI (kg/m2)
<25.0	136	58.4	721	73.9	0.0001	229	57.5	209	78.3	0.00001
25.0–29.9	77	33.0	220	22.6		118	29.6	38	14.2
⩾30.0	20	8.6	34	3.5		40	10.1	13	4.9
Unknown						11	2.8	7	2.6
Height (in cm)
<160	204	87.6	852	87.4	0.944	342	85.4	227	85.0	0.915
⩾160	29	12.4	123	12.6		45	11.3	33	12.7
Unknown						11	2.8	7	2.6
Waist size (in cm)
⩽85	150	64.4	772	79.2	0.0001	270	67.8	212	79.4	0.002
>85	83	35.6	203	20.8		119	29.9	48	18.0
Unknown						9	2.3	7	2.6
Hip size (in cm)
⩽100	197	84.5	902	92.5	0.0001	299	75.1	223	83.5	0.019
>100	36	15.5	73	7.5		90	22.6	37	13.9
Unknown						9	2.3	7	2.6
WHR
⩽0.85	53	22.7	260	26.7	0.22	150	37.7	103	38.6	0.657
>0.85	180	77.3	715	73.3		248	62.3	157	58.8
Unknown								7	2.6
Body size at 10 years a
Figure 1	95	40.8	449	46.1	0.02	87	21.9	95	35.6	0.001
Figure 2	113	48.5	450	46.2		248	62.3	146	54.7
Figure 3	22	9.4	47	4.8		50	12.6	20	7.5
Figures 4–9	3	1.3	29	3.0		13	3.3	6	2.2
Body size at 20 years a
Figures 1+2	87	37.3	362	37.1	0.79	84	21.1	89	33.3	0.001
Figure 3	112	48.1	486	49.8		187	47.0	121	45.3
Figures 4–9 Unknown	34	14.6	127	13.0		127	31.9	57	21.3
Current body size a
Figures 1+2+3	9	3.9	37	3.8	0.54	188	47.2	149	55.8	0.0001
Figures 4–9	224	96.1	938	96.2		210	52.8	118	44.2

BMI=body mass index; WHR=waist-to-hip ratio.

^aSee Figure 1 (pitcogram).