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

Table 6 Post-operative outcomes in the subgroup of patients with left sided colon cancer

		BMI < 30 (% of group)	BMI ≥ 30 (% of group)	Total	P value
Patients		143	61	204
Post-operative complication (CD grade)	No complication	90 (62.9)	32 (52.5)	122	0.09
	Complication	53 (37.1)	29 (47.5)	82
	I	7 (4.9)	6 (9.8)	13
	II	32 (22.4)	12 (19.7)	44
	IIIa	3 (2.1)	6 (9.8)	9
	IIIb	5 (3.5)	2 (3.3)	7
	IVa	3 (2.1)	2 (3.3)	5
	IVb	0 (0.0)	1 (1.6)	1
	V	3 (2.1)	0 (0.0)	3
	No complication or low-grade complication (CD I-II)	129 (90.2)	50 (82.0)	179	0.11
	High-grade complication (CD IIIa-V)	14 (9.8)	11 (18.0)	25
Any surgical complication		29 (20.3)	17 (27.9)	46	0.27
Specified surgical complications	Abdomino-pelvic collection	7 (4.9)	2 (3.3)	9	0.73
	Anastomotic leak	4 (2.8)	2 (3.3)	6	1.00
	Wound infection	4 (2.8)	3 (4.9)	7	0.43
	Prolonged ileus	17 (11.9)	9 (14.8)	26	0.65
	Post-operative hemorrhage	1 (0.7)	0 (0.0)	1	1.00
	Return to theatre	5 (3.5)	3 (4.9)	8	0.70
	Post-operative sepsis	3 (2.1)	0 (0.0)	3	0.56
Any medical complication		28 (19.6)	6 (9.8)	34	0.10
Specified medical complications	VTE (DVT/PE)	1 (0.7)	1 (1.6)	2	0.51
	Pneumonia	5 (3.5)	2 (3.3)	7	1.00
	Ischemic cardiac event	1 (0.7)	0 (0.0)	1	1.00
	Cardiac arrhythmia	6 (4.2)	0 (0.0)	6	1.00
	Respiratory failure	4 (2.8)	2 (3.3)	6	1.00
	Renal failure	4 (2.8)	0 (0.0)	4	0.32
	Unplanned ICU admission	5 (3.5)	2 (3.3)	7	1.00
Post-operative length of stay (d)		7 (IQR 5-10)	7 (IQR 5-10)		0.89

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