From: The manual mycobacteria growth indicator tube and the nitrate reductase assay for the rapid detection of rifampicin resistance of M. Tuberculosisin low resource settings
APM
NRA
Sensitivity %
Specificity %
Likelihood ratio
No.of resistant isolates
No.of susceptible isolates
Positive
negative
Resistant (27)
23
4
85
98
0.15
Susceptible (346)
3
343
99