Improving polyp detection at colonoscopy: Non-technological techniques

Table 6 Results of studies evaluating proximal colon retroflexion

Ref.	Outcome	RV	SFV	P value
Harrison et al[44]	No difference in AMR in SFV vs RV	23.7%	33.3%	0.31
Hewett et al[46]	AMR in RV comparable to 2nd examination in SFV	NA	NA	NA
Chandran et al[45]	Increased ADR in RV vs SFV	26.40%	24.60%	< 0.001
Kushnir et al[49]	No difference in ADR in SFV vs RV	47%	46%	0.75
Lee et al[50]	Increased ADR in RV vs SFV	27.50%	25.50%	< 0.001
Núñez Rodríguez et al[51]	No difference in ADR in SFV vs RV	9%	12%	0.28
Rath et al[52]	No difference in ADR in SFV vs RV	42%	44.3%	0.88
Michopoulos et al[53]	Increased ADR in RV vs SFV	22.75%	14.20%	< 0.01

AMR: Adenoma miss rate; ADR: Adenoma detection rate; SFV: Standard forward view; RV: Retroflexed view; NA: Not available.