Table 1

Assay characteristics

AssayNo. of samples with resultaSensitivity (%)bSpecificity (%)bPPV (%)bNPV (%)b
TPFPFNTN
BD MAX MRSA316276693.9 [79.8, 99.3]99.2 [98.3, 99.7]83.8 [68.0, 93.8]99.7 [99.1, 100]
BD GeneOhm MRSA ACPc3013275593.8 [79.2, 99.2]98.3 [97.1, 99.1]69.8 [53.9, 82.8]99.7 [99.1, 100]
  • a Results obtained in comparison to culture. TP, true positive; FP, false positive; FN, false negative; TN, true negative.

  • b Ninety-five percent confidence interval is shown in brackets.

  • c Five samples that remained unresolved were excluded from the summarizing analysis. Including those samples as “negatives” accounts for 90.9%, 98.3%, 69.8%, and 99.6% for sensitivity, specificity, PPV, and NPV, respectively.