Comparison 2. Intravenous iron versus placebo (time to end of follow‐up).

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Haemoglobin concentration taken at the end of follow‐up	8	548	Mean Difference (IV, Random, 95% CI)	3.04 [0.65, 5.42]
1.1 < 10 weeks	4	80	Mean Difference (IV, Random, 95% CI)	2.90 [‐2.16, 7.96]
1.2 > 10 weeks	4	468	Mean Difference (IV, Random, 95% CI)	3.37 [‐0.02, 6.76]