Improving polyp detection at colonoscopy: Non-technological techniques

Table 1 Summary of studies evaluating colonic withdrawal times

Ref.	Year	Design	n	Outcome
Barclay et al[17]	2006	Prospective	7882	WT > 6 min associated with increased ADR
Barclay et al[18]	2008	Prospective	2053	WT ≥ 8 min associated with increased ADR
Sawhney et al[19]	2008	Prospective	23,910	Minimum 7 min WT not associated with increased PDR
Gellad et al[27]	2010	Prospective	304	WT ≥ 12 min not associated with risk of interval neoplasia
Gromski et al[21]	2012	Prospective	1210	WT ≥ 10 min associated with increased ADR
Moritz et al[24]	2012	Prospective	4429	WT ≥ 6 min not associated with increased ADR
Lee et al[20]	2013	Prospective	31088	WT up to 10 min associated with increased ADR
Butterly et al[28]	2014	Prospective	7996	WT ≥ 9 min associated with increased ADR
Zhao et al[29]	2022	RCT	1027	Increased ADR associated with WT of 9 min vs WT of 6 min

WT: Withdrawal times; RCT: Randomized controlled trial; ADR: Adenoma detection rate; PDR: Polyp detection rate.