INHA and tuberculosis: INH resistance profiles when studied, stratified by RMP results, significant differences were reported between RrHr-TB (n = 4078) and RsHr-TB(n = 464) with regard to proportion of INH conferring mutation detected (87.1% vs 71.6%) and frequency of the mutations in inhA (7.6 vs 30.2%), katG (76.3 vs 41.2%) and combined inhA and katG (3.1% vs 0.2%).