Number needed for universal screening to prevent a single neonatal GBS infection that would occur with risk-based screening
| NEONATAL OUTCOMES | UNIVERSAL SCREENING % | RISK-BASED PROPHYLAXIS % | ABSOLUTE RISK REDUCTI ON WITH UNIVERSAL SCREENING % | NO. NEEDED FOR UNIVERSAL SCREENING TO PREVENT 1 CASE* |
|---|---|---|---|---|
| Neonatal GBS infections | 0.003 | 0.032 | 0.029 | 3449 |
| Neonatal GBS deaths | 0.00015 | 0.0016 | 0.00145 | 68 966 |
GBS—group B streptococcus.
↵* Number needed to screen equals 100 divided by percent absolute risk reduction.