CD4 and malaria: The following variables resulted predictive of malaria positivity (Table 3): age under 40 (O.R. = 1.56; 95%CI: 1.22–2.08), being unemployed (O.R. = 1.74; 95%CI: 1.24–2.21), irregularity of cotrimoxazole prophylaxis (O.R. = 1.42; 95%CI: 1.10–1.78), CD4 cell count < 200 (O.R. = 2.01; 95%CI: 1.42–2.32) and tuberculosis comorbidity (O.R. = 1.58; 95%CI: 1.17–2.79).