highly significantP < 1.4 × 10 –18
Of the 171 isolates with a putative resistance mutation (Figure S1), 107 (62.6%) had an available DST result for INH, with 99 reporting a resistant phenotype leading to a highly significant association between the putative drug resistance mutations and DST phenotype (Chi-squared P < 1.4 × 10 –18 ).