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

Table 5 Post-operative outcomes in the subgroup of patients with right sided colon cancer

		BMI < 30 (% of group)	BMI ≥ 30 (% of group)	Total	P value
Patients		205	92	297
Post-operative complication (CD grade)	No complication	94 (45.9)	44 (47.8)	138	0.61
	Complication	111 (54.1)	48 (52.2)	159
	I	21 (10.2)	9 (9.8)	30
	II	58 (28.3)	23 (25.0)	81
	IIIa	19 (9.3)	7 (7.6)	26
	IIIb	3 (1.5)	1 (1.1)	4
	IVa	8 (3.9)	5 (5.4)	13
	IVb	0 (0.0)	2 (2.2)	2
	V	2 (1.0)	1 (1.1)	3
	No complication or low-grade complication (CD I-II)	173 (84.4)	76 (82.6)	249	0.73
	High-grade complication (CD IIIa-V)	32 (15.6)	16 (17.4)	48
Any surgical complication		52 (25.4)	22 (23.9)	74	0.88
Specified surgical complications	Abdomino-pelvic collection	7 (3.4)	3 (0.0)	10	0.10
	Anastomotic leak	7 (3.4)	0 (0.0)	7	1.00
	Wound infection	10 (4.9)	3 (3.3)	13	0.76
	Prolonged ileus	26 (12.7)	14 (15.2)	40	0.58
	Post-operative hemorrhage	1 (0.5)	2 (2.2)	3	0.23
	Return to theatre	3 (1.5)	1 (1.1)	4	1.00
	Post-operative sepsis	2 (1.0)	1 (1.1)	3	1.00
Any medical complication		55 (26.8)	25 (27.2)	80	1.00
Specified medical complications	VTE (DVT/PE)	2 (1.0)	1 (1.1)	3	1.00
	Pneumonia	14 (6.8)	6 (6.5)	20	1.00
	Ischemic cardiac event	2 (1.0)	3 (3.3)	5	0.17
	Cardiac arrhythmia	20 (9.8)	6 (6.5)	26	0.51
	Respiratory failure	4 (2.0)	5 (5.4)	9	0.14
	Renal failure	7 (3.4)	6 (6.5)	13	0.23
	Unplanned ICU admission	8 (3.9)	4 (4.3)	12	1.00
Post-operative length of stay (d)		7 (IQR 5-11)	6 (IQR 5-11)		0.91

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