The Natural History and Predictors for Intervention in Patients with Small Renal Mass Undergoing Active Surveillance

Table 1

Patients and masses characteristics with statistical significance.

Feature	Active surveillance	NSS	value
Age			0.88
Mean (range)	68.6 (49–89)	69 (47–87)
Sex			0.63
Men	34	5
Women	29	2
Side			0.19
Right	30	6
Left	40	2
Follow-up, months	34.9 (12–112)	25.9 (13–46)	0.28
Size at Dx, mm	18 (5–40)	24.9 (8–40)	0.04
Growth rate, cm/year	0.12 (−0.29–0.65)	0.53 (0.18–0.88)	<0.0001