Table 1.

Patient demographics by surgical type.

	Study Patients		Historic Control*
	Lap radical (n=12)	Lap partial (n=8)	Lap radical (n=55)	Lap partial (n=97)
Age (range)	61 (45-85)	60 (48-73)	65 (38-88)	62 (26-89)
Sex:
Male	7 (58%)	4 (50%)	24 (44%)	62 (36%)
Female	5 (42%)	4 (50%)	31 (56%)	35 (64%)
Tumor size (cm)	8.1 (4.7-11)	5.3 (4.4-7.2)	7.7 (1.8-21)	2.6 (0.8-6.8)**
Dept of invasion (cm)	Not applicable	2.7 (1.7-4)	Not applicable	1.8 (.2-16)**
Preop CrCl	98 (64-153)	103 (50-179)	83 (8.7–186)	92 (25-191)
Clinical T category
cT1a	0	0	9 (16%)	82 (85%)
cT1b	1 (8%)	7 (87%)	19 (35%)	15 (15%)
cT2	9 (75%)	1 (13%)	25 (45%)	0
cT3a	0	0	0	0
cT3b	2 (16%)	0	2 (4%)	0
Clinical N category
cN0	11 (92%)	8 (100%)	49 (88%)	95 (98%)
cN1	0	0	2 (4%)	1 (1%)
cN2	1 (8%)	0	4 (8%)	1 (1%)
Clinical M category
cM0	8 (67%)	8 (100%)	48 (87%)	96 (99%)
cM1	4 (33%)	0	7 (13%)	1 (1%)

^*Surgeries performed by the same surgeon at the same institution during the study period

^**p-value comparison of study patients and historic control patients who underwent lap partial (only p-values<0.05 are noted):

Tumor size <0.001

Dept of invasion 0.002

Abbreviations: Lap radical, laparoscopic radical nephrectomy, Lap partial, laparoscopic partial nephrectomy, CrCl, creatinine clearance