The burden of risk factors for non-communicable disease in rural Bihar, India: a comparative study with national health surveys

Table 3 The age and sex-specific distribution of BMI in the NCDRI study and the NFHS-5 survey

Women
	NCDRI Study				NFHS-5 Survey
Age (years)	N	Underweight (< 18.5 kg/m²)	Normal weight (18.5–25.0 kg/m²)	Overweight (≥ 25.0 kg/m²)	N	Underweight (< 18.5 kg/m²)	Normal weight (18.5–25.0 kg/m²)	Overweight (≥ 25.0 kg/m²)
15–19					8818	43.6	53.8	2.6
20–29					11,610	27	62.1	10.9
30–39	197	24.9	54.8	20.3	9779	16.4	59.4	24.2
40–49	315	20.6	54.0	25.4	7639	14.2	57.3	28.5
50–59	272	18.8	59.6	21.7
60–70	221	25.8	48.4	25.8
Overall, not standardized	1005	22.1	54.4	23.5	37,846	25.6	58.5	15.9
WHO age standardized at 40–49 years (95%CI)		20.6(13.3–29.8)	54.0(46.2–62.8)	25.4(17.9–34.5)		14.2(12.6–16.0)	57.3(55.6–59.0)	28.5(26.8–30.2)
Men
	NCDRI Study				NFHS-5 Survey
Age (years)	N	Underweight (< 18.5 kg/m²)	Normal weight (18.5–25.0 kg/m²)	Overweight (≥ 25.0 kg/m²)	N	Underweight (< 18.5 kg/m²)	Normal weight (18.5–25.0 kg/m²)	Overweight (≥ 25.0 kg/m²)
15–19					1036	46.2	51.4	2.4
20–29					1272	16.6	72.5	10.9
30–39	112	15.2	58.0	26.8	1011	11.6	65.6	22.8
40–49	309	13.6	67.6	18.8	827	10.4	63.8	25.8
50–59	289	18.7	57.8	23.5
60–70	315	21.6	62.2	16.2
Overall, not standardized	1025	17.7	62.1	20.2	4146	21.5	63.8	14.7
WHO age standardized at 40–49 years (95%CI)		13.6(6.0–24.5)	67.6(58.7–77.4)	18.8(10.8–29.3)		10.4(5.7–16.6)	63.8(58.5–69.5)	25.8(20.6–31.6)

BMI was calculated as weight in kilograms divided by the square of height in meters, and it was further categorized as: underweight (< 18.5 kg/m²), normal weight (18.5–25.0 kg/m²) and overweight (≥ 25.0 kg/m²). BMI estimates from the NCDRI Study were adjusted for age and sex, where appropriate. BMI estimates from the Bihar State NFHS-5 have been previously published [21]. The age-standardized prevalence estimates from the NCDRI Study and the NFHS-5 Survey were only estimated for overlapping age groups, such that BMI estimates were calculated for women and men aged 40–49. The age-standardized prevalence estimates were generated by weighting these estimates to the age distribution of the WHO’s standard population [22]

ISSN: 1471-2458