Table 7: A summary of the prospective randomized trials of no mechanical bowel preparation versus patients receiving mechanical bowel preparation in elective colon surgery 2000–2010. Some reports include all surgical site infections (*), whereas others include only surgical incision infections (**). Only one article concludes that there is a statistically significant difference in infection rates, which is higher in mechanically cleansed patients.

Author (Year)No mechanical preparationWith mechanical preparationStatistical significance
No. of patientsInfectionsNo. of patientsInfections

Miettinen et al. (2000)* [88]12920 (8%)13613 (10%)Not significant
Bucher et al. (2005)* [91]756 (8%)7817 (22%) higher with mechanical preparation
Fa-Si-Oen et al. (2005)* [90]12513 (10%)12516 (13%)Not significant
Ram et al. (2005)** [89]16510 (6%)16416 (10%)Not significant
Zmora et al. (2006)* [92]12917 (13%)12015 (12%)Not significant
Jung et al. (2007)* [94]657106 (16%)686103 (15%)Not significant
Contant et al. (2007)** [93]68496 (14%)67090 (13%)Not significant
Pena-Soria et al. (2008)* [95]6411 (17%)6519 (29%)Not significant
Van’t Sant et al. (2010)** [96]21336 (17%)23639 (16%)Not significant