Comparison 1. Low‐ and middle‐income countries: feeding vs control ‐ growth. RCT.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Weight gain	9	1057	Mean Difference (IV, Random, 95% CI)	0.12 [0.05, 0.18]
1.1 Subgroup analysis by age: < 12 months	7	910	Mean Difference (IV, Random, 95% CI)	0.11 [0.04, 0.18]
1.2 Subgroup analysis by age: 1 ‐ 2 years	1	65	Mean Difference (IV, Random, 95% CI)	0.32 [0.02, 0.62]
1.3 Subgroup analysis by age: > 2 years	1	82	Mean Difference (IV, Random, 95% CI)	0.06 [‐0.23, 0.35]
2 Height gain	9	1463	Mean Difference (IV, Random, 95% CI)	0.27 [0.07, 0.48]
2.1 Subgroup analysis by age: < 12 months	7	1316	Mean Difference (IV, Random, 95% CI)	0.22 [0.05, 0.39]
2.2 Subgroup analysis by age: 1 ‐ 2 years	1	65	Mean Difference (IV, Random, 95% CI)	0.90 [0.33, 1.47]
2.3 Subgroup analysis by age: > 2 years	1	82	Mean Difference (IV, Random, 95% CI)	‐0.5 [‐1.97, 0.97]
3 Weight‐for‐age z‐scores (WAZ)	8	1565	Mean Difference (IV, Random, 95% CI)	0.15 [0.05, 0.24]
4 Height‐for‐age z‐scores (HAZ)	9	4544	Mean Difference (IV, Random, 95% CI)	0.15 [0.06, 0.24]
5 Weight‐for‐height z‐scores (WHZ)	7	4073	Mean Difference (IV, Random, 95% CI)	0.10 [‐0.02, 0.22]