The number of patients treated per 1,000 births was 37 under the AAP strategy, 171 under the ACOG strategy, 307 under the CDC strategy, 323 under the Gotoff and Boyer strategy, and 1,000 with universal intrapartum prophylaxis.
The number of patients treated per case prevented was 38 under the AAP strategy, 106 under the ACOG strategy, 136 under the CDC strategy, 142 under the Gotoff and Boyer strategy, and 415 with universal intrapartum prophylaxis.
The number of GBS cases prevented was 32.9% under the AAP strategy, 53.8% under the ACOG strategy, 75.1% under the CDC strategy, 75.6% under the Gotoff and Boyer strategy, and 80.2% with universal intrapartum prophylaxis.
Intrapartum prophylaxis prevented the majority of EOGBS cases expected to occur in nearly one-fourth of infants born to mothers with intrapartum fever or PROM before 28 weeks of gestation, but would be of little benefit for infants born to mothers without intrapartum risk factors after 34 weeks of gestation.