Table 1.

Previous RCC studies and cancer specific survival rates of young and old RCC patients.

Study	Study period	Young group		Older group		5-year cancer specific survival rate		p Value
		No. patients	Mean age	No. patients	Mean age	Young	Old
Boykin et al. [3]	1947–1989	14		***	***	70%	***
Abou El Fettouh et al. [12]	1981–2001	101	33.7 y	***	***	67%	***
Eggener et al. [13]	1988–2002	91	37.1 y	***	***	88%	***
Schiff et al. [5]	1948–1980	37	31.0 y	486 (≥41 y)	***	92%*	45%*	p < 0.01
Rainwater et al. [14]	1970–1986	41	35.7 y	34 (≥80 y)	82.4 y	74%	70%	n.s.
Yusim et al. [14]	1985–1997	15	37.0 y	107 (≥50 y)	63.0 y	93%	77%	p < 0.05
Gillett et al. [16]	1970–2000	107	***	958 (60–70 y)	***	75%**	72%**	n.s.
Goetzl et al. [17]	1989–2002	34	35.0 y	99 (≥41 y)	65.0 y	85%	84%	n.s.
Sanchez-Ortiz et al. [18]	1992–2002	106	34.7 y	145 (58–61 y)	59.4 y	66%	52%	p < 0.01
Siemer et al. [19]	1975–2004	87	34.1 y	2164 (≥41 y)	***	78%	72%	n.s.

* only of stage I RCC

** only of clear cell RCC

*** no data available

y = years

n.s. = not significant (p < 0.05)