GSTM1 and tuberculosis: Multivariable analysis (n = 149) confirmed the same risk factors: drug-resistant TB (aOR 2.70; 95% CI 1.19–6.10; p = 0.02), alcohol abuse (aOR 2.36; 95%CI 1.06–5.23; p = 0.04) and Hb < 100 g/l (aOR 2.81; 95% CI 1.17–6.75; p = 0.02).