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. 2022 Apr 25;11(9):2404. doi: 10.3390/jcm11092404

Table 5.

Two-by-two tables illustrating the results of GTCMd assay and VAM assay compared to culture results to assess sensitivity, specificity, PPV and NPV.

Culture
Positive Negative
GTCMd Positive 33 5 b
Negative 4 a 22
Culture
Positive Negative
VAM Positive 27 1 d
Negative 10 c 26

a 1 × M. intracellulare and 1 × M. tuberculosis complex grown from culture were identified as M. spec. by GTCMd, 2 × M. abscessus subsp. abscessus were identified as M. chelonae by GTCMd. b 5 culture-negative samples were identified as 2 × M. xenopi, 2 × M. kansasii and 1 × banding pattern 4, 5, 10 with no identification of a single NTM species by GTCMd. c 1 × M. intracellulare, 1 × M. abscessus subsp. abscessus, 1 × M. kansasii grown from specimens were identified as M. spec., 7 isolates from seven culture-positive specimens were unidentified (2 × M. tuberculosis, 2 × M. chimaera, 1 × M. abscessus subsp. abscessus, 1 × M. abscessus subsp. massiliense, 1 × M. kansasii). d 1 × M. simiae (borderline) from 1 culture-negative specimen.