Table 5.

Risk ratio for poor treatment outcome among adults with tuberculosis with low versus normal pyrazinamide maximum serum concentrations, adjusted for human immunodeficiency virus (HIV) and CD4 cell count category, Gaborone, Botswana, 1997–2000.

Variable	Risk ratio (95% confidence interval)
Unadjusted	3.18 (1.58–6.39)
Stratified by HIV-CD4
Not HIV-infected	3.44 (0.59–20.26)
HIV-infected CD4 ≥ 200	2.21 (0.35–13.88)
HIV-infected CD4 <200	4.06 (2.72–6.06)
Adjusted§	3.38 (1.84–6.22)

^§Mantel-Haenszel risk ratio for poor outcome for low pyrazinamide versus normal pyrazinamide concentration, adjusted for HIV status and CD4 cell count category