Table 3.

Validity and reliability of phenotypic and genotypic drug resistance testing

Drug Test Reproducibility (Kappa coefficient)%
Sensitivity Specificity
INHPhenotypic 0.43 9850a
Genotypic 176 83a
RIF Phenotypic0.68 83 95
Genotypic 1 98 91
STR Phenotypic 0.6 71 100
Genotypic1 94 92
EMB Phenotypic 0.49 58100
Genotypic 1 100 100
  • a Results could not be interpreted correctly because of the high prevalence (90%) of INH resistance in the study population.