. 2018 Jul 31;7(2):111–118. doi: 10.7774/cevr.2018.7.2.111

Table 6. NTM sensitivity and specificity compared with the reference results of culture, PCR, and sequencing (number of MTBC samples=396).

EZplex MTBC/ NTM Real-time PCR	Reference results (culture, PCR, sequencing)			Sensitivity (95% CI, %)	Specificity (95% CI, %)	PPV^a) (95% CI)	NPV^a) (95% CI)
EZplex MTBC/ NTM Real-time PCR	Positive	Negative	Total	Sensitivity (95% CI, %)	Specificity (95% CI, %)	PPV^a) (95% CI)	NPV^a) (95% CI)
Positive	139	0	139	100 (96.6–100)	100 (98.2–100)	100 (97.4–100)	100 (98.6–100)
Negative	0	257	257
Total	139	257	473

NTM, nontuberculous mycobacteria; PCR, polymerase chain reaction; MTBC, Mycobacterium tuberculosis complex; CI, confidence interval; PPV, positive predictive value; NPV, negative predictive value.

^a)The PPV and NPV are the proportion of positive and negative results in diagnostic tests, considered as the true positive and true negative results.