Table 3. Summary of meta-analyses for survival of grafts according to donor genders (FD or MD) and recipient genders (FR or MR); and survival of patients according to kidney transplant recipient genders.

Outcome/Time	Studies	Subjects	RR	95%CI	pa	I2 (%)b
Graft survival	FD versus MD
1 year	3,5,30	7,478	1.02	0.97;1.07	0.43	70.0c
2 years	5,30,41	8,154	1.03	1.00;1.07	0.07	27.0
3 years	5,30,41	8,154	1.02	0.94;1.12	0.58	67.0c
5 years	3,30	589	0.89	0.79;1.00	0.06	0
8 years	4,30	761	0.86	0.73;1.02	0.09	11.0
10 years	3,30	589	0.82	0.68;0.98	0.03	0
Graft survival	FR versus MR
1 year	2,5,10	8,348	1.01	0.99;1.03	0.30	0
5 years	2,6,15	1,402	0.99	0.88;1.12	0.88	75.0c
10 years and older	15,24	747	1.23	0.68;2.24	0.50	95.0c
Patient survival	FR versus MR
10 years and older	15,24	747	0.96	0.67;1.37	0.81	95.0c

RR: relative risk

^a Value of p < 0.10 of Z-test for all effects.

^b Value of I2 > 40.0% indicates statistical heterogeneity among studies.

^c Significant heterogeneity (p < 0.10).