. 2015 Mar 11;18(16):2998–3012. doi: 10.1017/S1368980015000415

Table 9.

Odds ratios and 95 % confidence interval for low &BF^† from the adjusted logistic regression analyses in 18-year-old men and women, Johannesburg–Soweto, South Africa, Birth to Twenty Plus (Bt20+) cohort

		Step 1		Step 2
	n	Adjusted OR^‡	95 % CI	Adjusted OR^‡	95 % CI
Men (n 550)
Intrinsic factors
Height	550	1·02	0·99, 1·05	1·03	0·99, 1·06
Age (<18 years^§)	217
≥18 years	333	1·68**	1·17, 2·41	1·74**	1·20, 2·51
Population group (black African^§)	461
White	35	0·55	0·26, 1·15	0·66	0·29, 1·52
Mixed ancestry	54	2·34*	1·19, 4·60	2·38*	1·20, 4·72
Low birth weight (<2500 g) (no^§)	496
Yes	54	1·60	0·84, 3·02	1·60	0·84, 3·02
Household socio-economic factors
Caregiver education (3rd tertile (higher)^§)	79
≤Primary school	79			2·03⁽*⁾	0·99, 4·16
Secondary school	392			1·54	0·88, 2·71
Adolescent smoking status (never smoked^§)	143
Previous smoker	160			0·90	0·57, 1·44
Current smoker	247			1·60*	1·03, 2·48
Cox/Snell and Nagelkerke R ² estimates		0·036, 0·049		0·057, 0·078
Deviance		714·8		702·69
Women (n 520)
Intrinsic factors
Height	520	1·04⁽*⁾	0·99, 1·08	1·04⁽*⁾	0·99, 1·08
Age (<18 years^§)	219
≥18 years	301	2·20**	1·30, 3·73	2·21**	1·31, 3·74
Population group (black African^§)	439
White	17	2·84⁽*⁾	1·00, 8·08	3·10⁽*⁾	0·92, 10·5
Mixed ancestry	64	2·40**	1·30, 4·41	2·48**	1·29, 4·76
Age of entry into menarche (<13 years^§)	203
≥13 years	317	1·64⁽*⁾	0·98, 2·73	1·63⁽*⁾	0·98, 2·72
Neighbourhood socio-economic factors
Place of residence (Soweto^§)	435
Metropolitan Johannesburg	85			0·90	0·44, 1·86
Cox/Snell and Nagelkerke R ² estimates		0·061, 0·101		0·061, 0·101
Deviance		448·60		448·5

%BF, percentage body fat.

⁽*⁾ P<0·10, *P<0·05, **P<0·01, ***P<0·001.

^†

Low %BF was defined as fat mass ≤15·00th percentile⁽ ⁴⁹ ⁾.

^‡

OR adjusted by logistic regression.

^§

Reference category.