. Author manuscript; available in PMC: 2016 Oct 1.

Published in final edited form as: Gastrointest Endosc. 2015 Oct;82(4):668–675. doi: 10.1016/j.gie.2014.12.056

Table 1.

Exclusion criteria employed in Previous Studies

Excluded subjects based on this criteria	Number of studies that use this exclusion criteria n (%)”	GIQuIC	AGA Registry	Raju	Kahi (2013a)	Lee (2011)	Schoenfeld^D	Boroff	Imperiale (2000)	Barclay	Jiang	Leffler	Gohel	Betes	Coe	Imperiale (2009)	Williams	Robertson	Lieberman	Nelson	Munson	Anderson	Chen	Sanchez	Millan	Kahi (2013b)	Corley	Lee^E	Shaukat	Kaminski^F	Hernandez
Age	19 (63.33)	X	X		X	X	X		X		X		X	X		X	X		X	X		X				X	X	X	X	X
<18^H	1 (3.33)					x
<40	3 (10.00)						x							x																x
<50	15 (50.00)	x	x		x				x		x		x			x	x		x	x		x				x	x		x	x
>75^B	7 (23.33)		x				x				x		x						x	x								x
Prior colonoscopy	14 (46.67)		X	X	X		X	X	X	X		X	X	X		X			X	X									X
Any prior colonoscopy	9 (30.00)			x				x	x	x		x	x			x			x										x
If prior colonoscopy^K
<5yrs	2 (6.67)				x									x
<10yrs^C	4 (13.33)		x				x												x	x
Incomplete colonoscopy	12 (40.00)	X				X							X	X	X		X	X	X		X	X		X						X
Did not reach cecum	10 (33.33)					x							x	x	x		x	x	x		x	x		x
Anatomy was not intact^I	1 (3.33)														x
Prep was inadequate	7 (23.33)	x											x		x						x	x		x						x
Indication
High-risk screening	17 (56.67)	X		X	X	X	X	X	X				X	X	X		X	X			X	X				X			X		X
Family hist of CRC/polyps	5 (16.67)												x	x							x	x				x
Familial syndrome/ polyposis^I	10 (33.33)			x	x	x	x						x		x		x	x				x				x
Surveillance				X	X	X	X		X	X			X	X		X	X	X	X	X	X	X	X	X		X					X
Personal history^J	19 (63.33)			x	x	x	x		x	x			x	x		x	x	x	x	x	x	x	x	x		x					x
Diagnostic	18 (60.00)						X		X	X			X	X	X	X	X		X	X	X	X		X	X	X		X	X		X
Inflammatory bowel disease	12 (40.00)			x	x	x	x		x				x		x		x				x	x	x			x
Bleeding^G	10 (33.33)						x		x				x	x	x				x	x	x	x						x
Pain	6 (20.00)								x				x	x					x	x	x
Anemia	4 (13.33)						x							x							x	x
Change in bowel habits	5 (16.67)								x					x					x	x	x
Symptoms of colon disorders (ex. colitis)	4 (13.33)									x					x				x	x
Weight loss	3 (10.00)						x							x							x
Abdominal radiation^I	1 (3.33)													x

Denis et al did not include any exclusion criteria in this study as it was the goal of the study to identify better indicators for colonoscopy quality than their institution was currently using.

Schoenfeld et al established the upper age limit at 79 years

Schoenfeld et al excluded patients that had a positive colonoscopy study within the prior 10 from the starting point of their study

The prior colonoscopy exclusion criteria applies to screening colonoscopies, not to surveillance colonoscopies included in this study

The age limit in the study was between 60–74 years of age.

Upper limit for this study is 66 years of age

Exclusion criteria of bleeding for diagnostic colonoscopies includes rectal bleeding, hematochezia, and a positive FOBT

We did not use this criterion in our analyses because there was only one colonoscopy in our dataset performed on a patient <18

We could not identify and exclude these cases with sufficient accuracy using the data we abstract from each colonoscopy report. Therefore we did not include them in the rest of the analyses

Personal history of polyposis/polyps/prior polypectomy/previous colon resection/CRC

Some studies excluded patients with prior colonoscopy, but did not designate a cutoff on how long ago that colonoscopy was performed