Table 2. Univariate Cox proportional hazard regression model of different age cutoffs in patients with local RCC treated with radical nephrectomy.

Cutoff Point (years)	Categories	HR	95% CI	p value
35	≤35(n = 121) vs > 35(n = 1026)	2.07	0.96–4.43	0.062
40	≤40(n = 258) vs > 40(n = 887)	1.87	1.14–3.09	0.013
45	≤45(n = 408) vs > 45(n = 739)	1.78	1.18–2.67	0.005
50	≤50(n = 565) vs > 50(n = 582)	1.60	1.11–2.29	0.011
55	≤55(n = 711) vs > 55(n = 436)	1.49	1.05–2.13	0.025
60	≤60(n = 851) vs > 60(n = 296)	1.39	0.95–2.02	0.083
65	≤65(n = 961) vs > 65(n = 186)	1.40	0.91–2.16	0.123
70	≤70 (n = 1057) vs >70(n = 90)	1.46	0.82–2.60	0.194