Nurse Participation in Colonoscopy Observation versus the Colonoscopist Alone for Polyp and Adenoma Detection: A Meta-Analysis of Randomized, Controlled Trials

Table 1

Characteristics of included randomized controlled trials.

Trials	Country	Colonoscopy indication	Exclusion criteria	(total)	Defined age for patients included	Patients allocated to nurse participation	Patients allocated to colonoscopist alone
Lee et al., 2011 [12]	Korea	Asymptomatic average risk individuals for screening colonoscopy	(1) GI bleeding, history of colorectal surgery, IBD, hereditary colorectal cancer, or polyposis syndrome and inability to provide consent; failed intubation and inadequate withdrawal time	791	≥50	407	384
Kim et al., 2012 [13]	Korea	Average risk patients for screening colonoscopy	(1) Symptoms for lower gastrointestinal tract disease; (2) family history of CRC; (3) personal history of CRC, polyps, or IBD; (4) history of a colorectal examination within 5 years or colorectal surgery; (5) failed to reach the cecum	383	≥50	192	191
Aslanian et al., 2013 [14]	USA	Patients for outpatient screening colonoscopy	IBD, hereditary colorectal cancer syndromes	502	None	253	249