HMOX1 and pulmonary tuberculosis: Multivariate analysis showed that chitinase protein (adjusted odd ratio (aOR) [95% CI] 0.991 [0.989 – 0.993]; p<0.001) and IDO protein (aOR [95% CI] 0.174 [0.013 – 0.621]; p=0.007) were associated with decreased risk of adverse treatment outcomes, while HO-1 (OR [95% CI] 1.773 [0.013 – 400]; p=0.927) was not associated with adverse treatment outcomes Thus, low baseline plasma levels of IDO protein and chitinase protein are correlates of risk for adverse treatment outcomes in active pulmonary TB patients (Table 2).