Table 4.

Effect of Development Media International's radio campaign on all-cause under-5 child mortality (intention-to-treat analysis)

	Mortality rate per 1000 livebirths (95% CI)		Risk ratio (95% CI); p
	Control group	Intervention group	Cluster-level analysis, adjusted for pre-intervention level*	Cluster-level analysis, adjusted for pre-intervention level and confounder score†
March, 2010, to February, 2012	115·5 (93·6–137·4)	150·5 (126·8–174·1)	..	..
March, 2012, to December, 2012	105·0 (81·8–128·3)	137·0 (115·6–158·3)	1·02 (0·85–1·23); 0·763	1·03 (0·83–1·29); 0·560
January, 2013, to October, 2013	87·9 (66·9–108·9)	126·5 (102·8–150·2)	1·06 (0·92–1·21); 0·310	1·01 (0·87–1·18); 0·846
November, 2013, to October, 2014	76·5 (60·1–92·8)	105·1 (85·0–125·1)	1·04 (0·82–1·32); 0·696	1·02 (0·77–1·36); 0·843
March, 2012, to October, 2014	89·1 (68·8–109·3)	121·6 (101·4–141·9)	1·04 (0·88–1·22); 0·534	1·02 (0·84–1·24); 0·710

^*p value for effect modification by time=0·698.

^†p value for effect modification by time=0·698.