Table 2.

Baseline and operative parameters of matched patients who underwent parenchyma-sparing resections versus oncologic resections

Baseline and Operative Parameters
	PSR	Oncologic resection
Total n	221 (50.0)	221 (50.0)
Parameter	n(%)/mean (SE)	n(%)/mean (SE)	p-value
Age in years	55 (0.95)	55 (0.99)	0.842
Gender
Female	110 (49.8)	106 (48.0)	0.775
ASA score
III-IV	93 (43.9)	101 (45.7)	0.419
BMI in kg/m2	30.3 (0.7)	29.2 (1.65)	0.555
Minimal invasive procedures	72 (32.6)	30 (13.6)	<0.001
Blood loss in ml	209.1 (24.8)	511.2 (37.4)	<0.001
Operative time in min	180.0 (8.3)	330.0 (23.2)	<0.001
Tumor size in cm	2.1 (0.10)	2.1 (0.11)	0.999
Histopathological parameters
WHO Grading
G1	192 (86.8)	169 (76.4)
G2	28 (12.7)	48 (21.7)
G3	1 (0.4)	4 (1.9)	<0.001
Ki-67 Index
>3	29 (13.1)	41 (18.6))	<0.001
Vascular invasion	28 (13.9)	41 (20.9)	0.065
Perineural invasion	18 (8.9)	42 (21.8)	<0.001
Lymph nodes harvested
Yes	111 (40.2)	195 (88.2)	<0.001
Number of lymph nodes harvested	1.4 (0.2)	9.9 (0.6)	<0.001
Lymph nodes positive	0.9 (0.09)	1.1 (0.08)	0.808
Positive nodal status	15 (6.7)	17 (7.7)	0.999
T stage (AJCC 8th ed.)
T3–4	19 (8.6)	44 (20.4)	<0.001
R status
R+	58 (26.2)	18 (8.1)	<0.001

PSR: Parenchyma-sparing resection; ASA: American Society of Anesthesiologists; BMI: Body mass index