Table 2

Regression estimates for costs, effects and cost-effectiveness (pound sterling 2015–16)

Control (46 wards; 4612 mother-infant dyads)Intervention (46 wards; 5398 mother-infant dyads)
Mean(95% CI)Mean(95% CI)
Base-case analysis
 Total cost per ward (£)£0(0 to 0)£9738(8520 to 10957)
 Incremental cost (£)£9738(8520 to 10957)
 Percentage of babies breast fed at at 6–8 weeks per ward31.7%(29.4 to 34.0)37.9%(35.0 to 40.8)
 Total number of babies breast fed at 6–8 weeks per ward29(27 to 32)39(36 to 43)
 Incremental number of breastfed babies10(6 to 14)
 Cost per additional baby breast fed at 6–8 weeks (£)£974
Deterministic sensitivity analyses
Assuming that the provision of vouchers is the only accruable to the intervention
 Total voucher cost per ward (£)£0(0 to 0)£7251(6117 to 8385)
 Incremental non voucher cost (£)£7251(6117 to 8385)
 Total number of babies breast fed at 6–8 weeks per ward29(27 to 32)39(36 to 43)
 Incremental breast feeding10(6 to 14)
 Voucher cost per additional baby breast fed at 6–8 weeks (£)£725
Assuming that the provision of vouchers will be free of charge to the providers
 Total non-voucher cost per ward (£)£0(0 to 0)£2498(2355 to 2638)
 Incremental non-voucher cost (£)£2498(2355 to 2638)
 Total number of babies breast fed at 6–8 weeks per ward29(27 to 32)39(36 to 43)
 Incremental breast feeding10(6 to 14)
 Non-voucher cost per additional baby breast fed at 6–8 weeks (£)£250
Cost of routinely rolling out intervention
 Total roll out cost per ward (£)£0(0 to 0)£8402(7154 to 9649)
 Incremental roll out cost (£)£8402(7154 to 9649)
 Total number of babies breast fed at 6–8 weeks per ward29(27 to 32)39(36 to 43)
 Incremental breast feeding10(6 to 14)
 Roll cost per additional baby breast fed at 6–8 weeks (£)£840