Table 3. Association of child anaemia with overall mortality among children born to HIV-infected women, Dar es Salaam, Tanzania.

Child anaemia	Child-months at risk	No. of deaths	Hazard ratio* (univariate)	95% CI	P value*	Hazard ratio† (adjusted)	95% CI	P value†
Hb (g/dl)
<8.5	3590	43	1.30	0.91,	0.16	1.38	0.95,	0.10
≥8.5	11882	134	1.00	1.86		1.00	2.01
Hb < 8.5 g/dl and hypochromic microcytosis
Yes	548	12	2. 34	1.29,	0.005	1.99	1.06,	0.03
No	14924	165	1.00	4.23		1.00	3.72

^*From separate univariate Cox proportional hazards models with anaemia as a time-dependent covariate.

^†From separate multivariate Cox proportional hazards models with anaemia as a time-dependent covariate. The multivariate models also included the following adjusting variables, with indicator variables for individuals missing data on a particular variable: maternal trial regimen, CD4 cell count during pregnancy, education, daily per capita amount of money spent on food and the child variables of birth weight, age started semi-solid foods, time-varying CD4 cell counts, malaria parasitaemia and HIV infection status.