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

Table 7 Post-operative outcomes in the subgroup of patients with rectal cancer

		BMI < 30 (% of group)	BMI ≥ 30 (% of group)	Total	P value
Patients		48	20	68
Post-operative complication (CD grade)	No complication	22 (45.8)	6 (30.0)	28	0.68
	Complication	26 (54.2)	14 (70.0)	40
	I	3 (6.3)	2 (10.0)	5
	II	8 (16.7)	5 (25.0)	13
	IIIa	5 (10.4)	2 (10.0)	7
	IIIb	5 (10.4)	3 (15.0)	8
	IVa	2 (4.2)	2 (10.0)	4
	IVb	0 (0.0)	0 (0.0)	0
	V	3 (6.3)	0 (0.0)	3
	No complication or low-grade complication (CD I-II)	33 (68.8)	13 (65.0)	46	0.78
	High-grade complication (CD IIIa-V)	15 (31.2)	7 (35.0)	22
Any surgical complication		18 (37.5)	7 (35.0)	25	1.00
Specified surgical complications	Abdomino-pelvic collection	2 (4.2)	1 (5.0)	3	1.00
	Anastomotic leak	1 (2.1)	2 (10.0)	3	0.20
	Wound infection	5 (10.4)	0 (0.0)	5	0.31
	Prolonged ileus	6 (12.5)	3 (15.0)	9	1.00
	Post-operative hemorrhage	1 (2.1)	0 (0.0)	1	1.00
	Return to theatre	5 (10.4)	3 (15.0)	8	0.68
	Post-operative sepsis	1 (2.1)	0 (0.0)	1	1.00
Any medical complication		13 (27.1)	5 (25.0)	18	1.00
Specified medical complications	VTE (DVT/PE)	1 (2.1)	0 (0.0)	1	1.00
	Pneumonia	0 (0.0)	0 (0.0)	0
	Ischemic cardiac event	2 (4.2)	2 (10.0)	4	0.58
	Cardiac arrhythmia	4 (8.3)	2 (10.0)	6	1.00
	Respiratory failure	2 (4.2)	1 (5.0)	3	1.00
	Renal failure	1 (2.1)	1 (5.0)	2	0.50
	Unplanned ICU admission	3 (6.3)	0 (0.0)	3	0.55
Post-operative length of stay (d)		9 (IQR 6-14)	10 (IQR 5-21)		0.91

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