Table 2.

Safety analysis of BMC transplantation.

	Safety outcome	No. of trials	Pooled risk ratio	95%CI	P-H	I2	P
With revascularization	All-cause of death	9	0.61	0.20–1.84	0.30	18%	0.38
	Ventricular arrhythmia	10	1.32	0.43–4.08	0.48	0%	0.63
	Recurrent myocardial infarction	7	2.88	0.12–67.29	–	–	0.51
	Cerebrovascular accident	7	2.14	0.66–7.00	0.27	24%	0.21
Without revascularization	All-cause of death	8	0.30	0.12–0.77	0.43	0%	0.01
	Ventricular arrhythmia	7	0.45	0.10–1.98	0.51	0%	0.29
	Recurrent myocardial infarction	4	0.33	0.06–1.80	0.19	41%	0.20
	Cerebrovascular accident	2	0.30	0.03–2.74	0.93	0%	0.29

P – p value; P-H – P value of Q for heterogeneity test; I² >50%, high heterogeneity; Random effects model was used when P value of Q for heterogeneity test P-H >0.1 or I² >50%; otherwise, fixed effect model was used; “–” – not applicable.