Effect of obesity on post-operative outcomes following colorectal cancer surgery

Table 4 Post-operative outcomes in the subgroup of patients undergoing laparoscopic colorectal cancer surgery

		BMI < 30 (% of group)	BMI ≥ 30 (% of group)	Total	P value
Patients		336	136	472
Post-operative complication (CD grade)	No complication	204 (60.7)	71 (52.2)	275	0.05
	Complication	132 (39.3)	65 (47.8)	197
	I	24 (7.1)	12 (8.8)	36
	II	71 (21.1)	29 (21.3)	100
	IIIa	20 (6.0)	10 (7.4)	30
	IIIb	6 (1.8)	6 (4.4)	12
	IVa	6 (1.8)	6 (4.4)	12
	IVb	0 (0.0)	2 (1.5)	2
	V	5 (1.5)	0 (0.0)	5
	No complication or low-grade complication (CD I-II)	299 (89.0)	112 (82.4)	411	0.07
	High-grade complication (CD IIIa-V)	37 (11.0)	24 (17.6)	61
Any surgical complication		68 (20.2)	37 (27.2)	105	0.11
Specified surgical complications	Abdomino-pelvic collection	9 (2.7)	3 (2.2)	12	1.00
	Anastomotic leak	7 (2.1)	5 (3.7)	12	0.34
	Wound infection	13 (3.9)	6 (4.4)	19	0.80
	Prolonged ileus	33 (9.8)	21 (15.4)	54	0.11
	Post-operative hemorrhage	2 (0.6)	1 (0.7)	3	1.00
	Return to theatre	6 (1.8)	6 (4.4)	12	0.11
	Post-operative sepsis	12 (9.0)	4 (6.2)	16	0.59
Any medical complication		66 (19.6)	21 (15.4)	87	0.36
Specified medical complications	VTE (DVT/PE)	3 (0.9)	1 (0.7)	4	1.00
	Pneumonia	13 (3.9)	2 (1.5)	15	0.25
	Ischemic cardiac event	3 (0.9)	3 (2.2)	6	0.36
	Cardiac arrhythmia	23 (6.8)	7 (5.1)	30	0.68
	Respiratory failure	7 (2.1)	6 (4.4)	13	0.21
	Renal failure	7 (2.1)	4 (2.9)	11	0.52
	Unplanned ICU admission	6 (1.8)	3 (2.2)	9	0.72
Post-operative length of stay (d)		6 (IQR 4-9)	6 (IQR 5-10)		0.15

BMI: Body mass index; CD: Clavien-Dindo; DVT: Deep vein thrombosis; ICU: Intensive care unit; IQR: Interquartile range; PE: Pulmonary embolism; VTE: Venous thrombo-embolism.