TABLE 2.

Meta-analysis Results of Trials of the Association Between Breastfeeding Interventions and Any or Exclusive Breastfeeding Outcomes

Estimate	Number of Estimates (k)	Cochran Q ( P value)	Random-effects variance (τ2)	RDREa (95% CI)	95% Population Effects Interval	95% Prediction Interval
Initiation, study data	12	41.32 (<.001)	0.005	0.09 (0.04 to 0.14)	(−0.04 to 0.22)	(−0.07 to 0.25)
Initiation, with imputed values	18	96.4 (<.001)	0.009	0.03 (−0.02 to 0.08)	(−0.20 to 0.26)	(−0.22 to 0.28)
1- to 3-mo any breastfeeding, study data	14	23.75 (.03)	0.004	0.10 (0.04 to 0.15)	(−0.02 to 0.21)	(−0.05 to 0.24)
1- to 3-mo any breastfeeding, with imputed values	20	47.98 (<.001)	0.007	0.04 (−0.01 to 0.09)	(−0.14 to 0.22)	(−0.15 to 0.23)
4- to 6-mo any breastfeeding	8	14.95 (.04)	0.004	0.08 (0.01 to 0.15)	(−0.04 to 0.20)	(−0.08 to 0.25)
1- to 3-mo exclusive breastfeeding	10	25.23 (.003)	0.003	0.04 (−0.01 to 0.10)	(−0.06 to 0.15)	(−0.09 to 0.18)
4- to 6-mo exclusive breastfeeding	8	7.40 (.39)	0	0.01 (−0.01 to 0.02)	(0.01 to 0.01)	(−0.01 to 0.02)

^aRandom-effects summary RD.