Performance of LPA test as compared to LJ DST in detecting resistance to rifampicin, isoniazid, and MDR-PTB in 242 smear positive sputum samples.

MDR-PTB = multi-drug resistant pulmonary tuberculosis; NPV = negative predictive value; PPV = positive predictive value,(values in parantheses are with 95% confidence intervals); 27/269 samples did not have both phenotypic and genotypic results and hence were excluded.