TABLE 3.

Summary of MB results

GroupPhenotypic resultsSensitivity (%)Specificity (%)PPV (%)NPV (%)
No. resistantNo. susceptible
INH
    Mutations detected105082.6710010098.11a
    No mutations detected2269
RIF
    Mutations detected79097.5310010099.95b
    No mutations detected269
  • a Calculated for a prevalence of 10% INH resistance.

  • b Calculated for a prevalence of 2% RIF resistance.