Table 3.

Effect of most recent BMI on incident tuberculosis among a cohort of HIV-positive adults in Soweto, South Africa.

	Univariate HR (95% CI)	P	aHR (95% CI)	P
BMI category
Underweight	1.6 (1.11–2.34)	0.013	1.2 (0.82–1.8)	0.332
Normal	REF		REF
Overweight	0.55 (0.40–0.75)	<0.001	0.62 (0.45–0.86)	0.004
Obese	0.31 (0.20–0.48)	<0.001	0.40 (0.26–0.63)	<0.001
HAART use	0.65 (0.49–0.88)	0.004	0.44 (0.32–0.59)	<0.001
CD4 cell count (cells/μl)
<200	REF		REF
200–349	0.44 (0.34–0.60)	<0.001	0.39 (0.29–.53)	<0.001
350–500	0.34 (0.23–0.49)	<0.001	0.30 (0.20–0.44)	<0.001
>500	0.16 (0.10–0.24)	<0.001	0.18 (0.11–0.27)	<0.001
IPT use	0.71 (0.50–1.0)	0.069	0.67 (0.42–1.1)	0.094
Household income (Rand/month)
<1000	REF		REF
1001–5000	1.0 (0.79–1.3)	0.985	1.1 (0.88–1.4)	0.401
>5000	0.70 (0.29–1.7)	0.439	0.82 (0.32–1.9)	0.672
Employed	1.2 (0.93–1.5)	0.166	1.0 (0.77–1.3)	0.906

aHR also adjusted for age, sex, and years since HIV diagnosis. aHR, adjusted hazard ratio; CI, confidence interval; HR, hazard ratio; IPT, isoniazid preventive therapy; REF, reference.