Effectiveness of policy to provide breastfeeding groups (BIG) for pregnant and breastfeeding mothers in primary care: cluster randomised controlled trial

Pat Hoddinott; Jane Britten; Gordon J Prescott; David Tappin; Anne Ludbrook; David J Godden

doi:10.1136/bmj.a3026

Table 2

Any breast feeding (exclusive or partial) as a proportion of those with known feeding behaviour

Primary and secondary outcomes	Mean (SD) breastfeeding rate		Mean difference between groups (95% CI for difference)*	P value for difference*	Non-participating localities† (overall proportion)
Primary and secondary outcomes	Intervention	Control	Mean difference between groups (95% CI for difference)*	P value for difference*	Non-participating localities† (overall proportion)
At 6-8 weeks
Pre-intervention	0.27 (0.03)	0.29 (0.08)			0.38
Post-intervention	0.26 (0.03)	0.30 (0.07)	−0.017 (−0.036 to 0.002)	0.08	0.39
At birth
Pre-intervention	0.50 (0.05)	0.51 (0.10)			0.59
Post-intervention	0.51 (0.06)	0.53 (0.09)	−0.009 (−0.045 to 0.027)	0.58	0.60
At 5-7 days
Pre-intervention	0.43 (0.04)	0.46 (0.09)			0.55
Post-intervention	0.42 (0.04)	0.45 (0.09)	−0.003 (−0.032 to 0.027)	0.84	0.55
At 8-9 months
Pre-intervention	0.22 (0.03)	0.23 (0.04)			0.28
Post-intervention	0.21 (0.05)	0.20 (0.06)	0.007 (−0.056 to 0.070)	0.82	0.25

*Adjusted for pre-intervention rate.

†Child Health Surveillance Programme data are for all NHS board areas that collect such data, excluding trial localities; Guthrie data are for all Scotland, excluding trial localities.