Comparison 7. Subgroup analysis ‐ cell type.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 All‐cause mortality (< 12 months)	17		Risk Ratio (M‐H, Random, 95% CI)	Subtotals only
1.1 Mononuclear cells	14	1153	Risk Ratio (M‐H, Random, 95% CI)	0.74 [0.38, 1.46]
1.2 Mesenchymal stem cells	2	101	Risk Ratio (M‐H, Random, 95% CI)	1.01 [0.15, 6.60]
1.3 Haematopoietic progenitor cells	2	151	Risk Ratio (M‐H, Random, 95% CI)	1.06 [0.13, 8.36]
2 All‐cause mortality (≥ 12 months)	14		Risk Ratio (M‐H, Random, 95% CI)	Subtotals only
2.1 Mononuclear cells	12	923	Risk Ratio (M‐H, Random, 95% CI)	0.88 [0.54, 1.43]
2.2 Mesenchymal stem cells	1	42	Risk Ratio (M‐H, Random, 95% CI)	3.0 [0.13, 69.70]
2.3 Haematopoietic progenitor cells	1	31	Risk Ratio (M‐H, Random, 95% CI)	2.82 [0.12, 64.39]