Table 1: Details of randomized clinical trials included in the meta-analysis. ES: emergency surgery; IOCL: intraoperative colonic lavage; NI: not indicated; RCT: randomized controlled trial; SBTS: stent as a bridge to surgery.

ReferenceYear
(duration)
Type of study
( of centres)
Tumor site (SBTS)Tumor site (ES)Intervention of patients (SBTS : ES)Type of stentStent to surgery time

Alcántara et al.2011
(February 2004 to December 2006)
RCT (1)Rectosigmoid (1)
Sigmoid (11)
Descending (1)
Splenic flexure (2)
Rectosigmoid (3)
Sigmoid (4)
Descending (2)
Splenic flexure (4)
Stent placement followed by planned 1-stage open surgery versus emergency 1-stage open surgery and IOCL15 : 135–7 days

Arezzo et al.2016
(March 2008 to November 2015)
RCT (5)Rectosigmoid (NI) Sigmoid (8) Descending (43) Splenic flexure (5)Rectosigmoid (NI)
Sigmoid (12) Descending (34) Splenic flexure (13)
Stent placement followed by planned open or laparoscopic surgery versus emergency surgery56 : 59Not indicated3–8 days

Cheung et al.2009
(January 2002 to May 2005)
RCT (1)Not reportedNot reportedStent placement followed by planned laparoscopic surgery versus emergency open surgery24 : 24<2 weeks

Ghazal et al.2013
(January 2009 to May 2012)
RCT (1)Rectosigmoid (12)
Sigmoid (14)
Descending (4)
Splenic flexure (0)
Rectosigmoid (10) Sigmoid (17) Descending (3) Splenic flexure (0)Stent placement followed by planned 1-stage open surgery versus emergency 1-stage total abdominal colectomy and ileorectal anastomosis30 : 30Not indicated7–10 days

Ho et al.2012
(October 2004 to February 2008)
RCT (1)Rectosigmoid (5) Sigmoid (10) Descending (3) Splenic flexure (2)Rectosigmoid (3) Sigmoid (8) Descending (6) Splenic flexure (2)Stent placement followed by open surgery versus emergency surgery20 : 191-2 weeks

Pirlet et al.2011
(December 2002 to October 2006)
RCT (9)Rectosigmoid (8) Sigmoid (15) Descending (6) Splenic flexure (0) Not available (1)Rectosigmoid (7) Sigmoid (18) Descending (2) Splenic flexure (3) Not available (0)Stent placement followed by open surgery versus emergency open surgery30 : 30NitinolNot reported

van Hooft et al.2011
(March 2007 to August 2009)
RCT (25)Not reportedNot reportedStent placement followed by open surgery versus emergency open surgery47 : 51  
<4 weeks