Clinical comparison of laparoscopy vs open surgery in a radical operation for rectal cancer: A retrospective case-control study

Table 1 Clinical comparison of radical operation data for rectal cancer

	LRR (n = 492)	ORR (n = 424)	P value
Gender
Male	301	243	0.235
Female	191	181
Age (yr, mean ± SD)	64.5 ± 11.9	63.3 ± 12.3	0.290
BMI (kg/m2)	23.274 ± 3.463	23.438 ± 3.533	0.999
Preoperative comorbid diseases	52.8% (260/492)	58.7% (249/424)	0.074
Hypertension	60	57
Coronary heart disease	37	34
Arrhythmia	21	20
COPD	10	13
Pulmonary infection	3	5
Asthma	2	3
Diabetes	42	70
Hepatic cirrhosis	4	3
Cerebral infarction	20	6
Renal failure	17	7
Autoimmune	5	0
Others	39	31
ASA score			0.498
I	109	108
II	321	264
III	62	52
Previous abdominal surgery	75 (15.2%)	65 (15.3%)	0.971

LRR: Laparoscopy in radical resection; ORR: Open radical resection; BMI: Body mass index; COPD: Chronic obstructive pulmonary disease; ASA: American Society of Anesthesiologists.