Event probability of:
antenatal GBS screening positive: 0.14;
mother screening negative for GBS but positive at delivery: 0.085;
mother screening positive for GBS and positive at delivery: 0.4779;
anaphylaxis after intrapartum chemoprophylaxis: 0.0001;
early-onset GBS sepsis after intrapartum chemoprophylaxis: 0;
chance of neonatal GBS infection occurring when mother has perinatal risk factors: 0.82;
neonatal GBS infection rate when the mother has perinatal risk factors: 0.1886;
neonatal GBS infection rate when mother has no perinatal risk factors: 0.0046;
overall neonatal sepsis rate when mother is a GBS carrier: 0.023;
neonatal death of infected babies: 0.28.