Table 2.

Clinical characteristics of included studies with ccRCC, pRCC and ChRCC

PRCC
	male	female	LN metastasis	Distant metastases	Mean age
Beck et al. [20]	117	40	–	9/157	62.2 ± 12
Toloken et al. [21]	236	74	7/310	unknown	64
Keengan et al. [22]	1740	538	67/2278	98/2278	–
Sterffens et al. [23]	436	129	50/565	54/565	62.1 ± 11.6
Lee et al. [24]	142	50	unknown	unknown	56.4 ± 13.5
Simone et al. [25]	40	15	13/55	5/55	59.1 ± 14.8
Wagener et al. [26]	1469	474	143/1943	151/1943	–
CCRCC
	male	female	LN metastasis	Distant metastases	Mean age
Beck et al	487	307	–	95/794	61.5 ± 12
Toloken et al	836	497	23	–	62
Keengan et al	8501	5340	172/13841	1219/12841	–
Sterffens et al	2772	1604	319/4376	618/4376	62.4 ± 11.2
Lee et al	1785	703	–	–	56.1 ± 12.4
Simone et al	599	321	29/920	68/920	59.8 ± 12.6
Wagener et al	3357	2243	210/5600	540/5600	–
Chromophobe
	male	female	LN metastasis	Distant metastases	Mean age
Beck et al	59	47	–	6/106	57.5 ± 12
Toloken et al	120	100	4	–	59
Keengan et al	568	381	11/949	36/949	–