Table 1 shows that when compared to patients without drug-induced HATT, those who developed drug-induced HATT showed a tendency of higher percentage of female gender (44.3% vs 31.9%, p = 0.051), NAT2 slow acetylator genotype (32.9% vs 21.8%, p = 0.051, power = 0.489), lower percentage of cavitation on initial chest radiography (7.1% vs 15.8%, p = 0.062), and significantly lower probability of positive sputum culture for M. tuberculosis after 2 months of anti-TB treatment (0% vs 11.1%, p = 0.014). This evidence concerns the gene NAT2 and tuberculosis.