Prognostic factors associated with treatment success in a time-dependent Cox regression model.

a<p>Adjusted with all covariates and stratified with culture converted before second-line drug.</p>b<p>Adjusted with covariates chosen by Akaike information criterion (AIC) and stratified with culture converted before second-line drug.</p>c<p>Treatment delay: the lag between sputum collection of MDR-TB and start of second-line drug > 120 days.</p><p>Abbreviations: aHR: adjusted hazard ratio; BMI: body mass index; CI: confidence interval; CXR: chest X-ray; TMTC: Taiwan Multi-drug Resistance Tuberculosis Consortiums.