Table 3 Sensitivity, specificity, predictive values (PPV, NPV) and likelihood ratios +LR, -LR) for the RiboSEQ GBS test and the BD GeneOhm™ StrepB Assay
RiboSEQGBS test | BD GeneOhm™ StrepB Assay | ||||
|---|---|---|---|---|---|
Positive | Negative | Positive | Negative | ||
Culture a | Positive | 107 | 4 | 105 | 6 |
Negative | 2 | 46 | 5 | 43 | |
Sensitivity | 96.4% | 94.6% | |||
95% CI | (90.5 - 98.8%) | (88.1 - 97.8%) | |||
Specificity | 95.8% | 89.6% | |||
95% CI | (84.6 - 99.3%) | (76.6 - 96.1%) | |||
PPV b | 98.2% | 95.5% | |||
95% CI | (92.9 - 99.7%) | (89.2 - 98.3%) | |||
NPV b | 92% | 87.8% | |||
95% CI | (79.9 - 97.4%) | (74.5 - 94.9%) | |||
+LR b | 23.1 | 9.1 | |||
95% CI | (5.9 - 89.9) | (3.9 - 20.8) | |||
-LR b | 0.04 | 0.06 | |||
95% CI | (0.01 - 0.1) | (0.03 - 0.13) | |||