Research Article
Accuracy of an Accelerated, Culture-Based Assay for Detection of Group B Streptococcus
Table 1
Antepartum validity of the accelerated GBS test compared to GBS culture.
| | GBS test (n = 356) | Prevalence | Sensitivity | Specificity | PPV | NPV |
| | In-house culture | 105 (29.5%) | reference | | Commercial culture | 84 (23.6%) | 73.3 (63.7–81.3) | 97.2 (94.1–98.8) | 91.7 (83.0–96.3) | 89.7 (85.3–92.9) | | Accelerated GBS test | 131 (36.8%) | 97.1 (91.3–99.3) | 88.4 (83.7–92.0) | 77.9 (69.6–84.4) | 98.7 (95.8–99.7) |
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Numbers are n (%). Data are % (95th percentile confidence interval).
PPV: positive predictive value; NPV: negative predictive value.
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