Table 4.

Effect of bowel preparation on outcome in patients undergoing rectal surgery

	Number of participants (MBP vs No MBP)	Odds ratio (95%CI), MBP vs No MBP	P value
Anastomotic leak	2351 (1042 vs 1309)	0.86 (0.64 to 1.15)	0.30
Surgical site infection	965 (513 vs 452)	1.22 (0.82 to 1.81)	0.33
Intra-abdominal collection	921 (486 vs 435)	0.54 (0.21 to 1.38)	0.20
Mortality	813 (419 vs 394)	0.73 (0.29 to 1.82)	0.50
Re-operation	1660 (688 vs 392)	1.57 (1.02 to 2.43)	0.04

Data from[39,45,46,50,56,57,59,71,75-77]. MBP: Mechanical bowel preparation