Comparison 4. Iron supplementation: long versus short treatment duration.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Haemoglobin (g/L)	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
1.1 Before further donation	1		Mean Difference (IV, Random, 95% CI)	0.0 [0.0, 0.0]
2 Serum or plasma iron (μg/dL)	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
2.1 Before further donation	1		Mean Difference (IV, Random, 95% CI)	0.0 [0.0, 0.0]
3 Transferrin saturation (%)	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
3.1 Before further donation	1		Mean Difference (IV, Random, 95% CI)	0.0 [0.0, 0.0]