Table 2.

 Estimated relative risks and costs associated with treatments for neonatal group B streptococcal infection. Values are means (95% confidence intervals) unless stated otherwise

Outcomes	Intravenous penicillin	Oral penicillin or erythromycin	Vaccination (expert opinion)
Maternal colonisation	NA	NA	0.66 (0.44 to 0.85)
Early onset GBS stillbirth	0.69 (0.23 to 0.97)	NA	0.38 (0.11 to 0.73)
Early onset GBS live birth*	0.03 (0.00 to 0.12)	0.28 (0.02 to 0.61)	0.38 (0.11 to 0.73)
Early onset infection other than GBS	0.73 (0.64 to 0.81)	0.74 (0.44 to 1.21)	NA
Late onset GBS	NA	NA	0.20 (0.06 to 0.42)
Cost per woman	£23.39	£3.92	£51.99

GBS=group B streptococcal infection. NA=not assessed.

*Effect given maternal colonisation.