Table 1. Study Characteristics.

Author, year, country	Study	Number of patients, RPDN/LDN	Age, RPDN/LDN	BMI, RPDN/LDN	NOS (max = 9)
Buell et al, 2004 [14], USA	RPDN-HALDN	28/31	44.5 ± 8.5/41.1 ± 11.5	26 ± 3.8/26.8 ± 4.4	7
Sundqvist et al, 2004 [13], Sweden	HARDN-LDN	11/14	48 ± 6.75/53.5 ± 7.25	26 ± 2.5/25.7 ± 1.75	7
Bachmann et al, 2006 [15], Switzerland	RDN-HALDN	77/47	54 ± 13/48 ± 5	26/24	7
Ruszat et al, 2006 [16], Switzerland	RDN-LDN	65/14	53 ± 10/46 ± 10	26 ± 4/24 ± 3	7
Ruszat et al, 2006 [16], Switzerland	RDN-HALDN	65/34	53 ± 10/50 ± 13	26 ± 4/24 ± 3	7
Troppmann et al, 2009 [17], USA	HARDN-HALDN	45/45	47 ± 10.75/45 ± 11	26.3 ± 3.78/26.6 ± 3.45	8
Dols et al, 2013 [18], the Netherlands	HARDN-LDN	95/95	52.8 ± 11.8/52.4 ± 11.7	26 ± 3.5/26.2 ± 3.5	9
Klop et al, 2013, [19], the Netherlands	HARDN-LDN	82/86	54 ± 11/52 ± 11.5	NR	8
Pooled estimates (total 769)		403 (53%)/366 (47%)	MD = 2.27 (-0.10, 4.65)	MD = 0.81 (-0.26, 1.87)	HQ = 8

RPDN: retroperitoneoscopic donor nephrectomy; LDN: laparoscopic donor nephrectomy; BMI: body mass index; HALDN: hand-assisted laparoscopic donor nephrectomy; HARDN: hand-assisted retroperitoneoscopic donor nephrectomy; MD: mean difference; HQ: high quality; NOS: Newcastle-Ottawa scale.