Diagnostic value of novel retroflexion colonoscopy in the right colon: A randomized controlled trial

Table 1 Patients’ baseline characteristics

	RV (n = 361)	FV (n = 361)	P value
Age (yr)	55 (50-65)	55 (45-63)	0.052
Sex, n (%)
Male	183 (50.7)	168 (46.5)	0.264
Female	178 (49.3)	193 (53.5)
BMI (kg/m2)	24.38 (22.31-25.95)	24.22 (20.76-26.99)	0.055
Indication for colonoscopy, n (%)
Screening (no history of colon polyps)	287 (79.5)	304 (84.2)	0.101
Surveillance (past history of colon polyps)	74 (20.5)	57 (15.8)
Current smokers, n (%)	92 (25.5)	90 (25.5)	0.864
Family history of colorectal cancer, n (%)	111 (30.7)	104 (28.8)	0.569
BBPS	7 (7-8)	7 (7-8)	0.195

RV: Retroflexion view; FV: Forward view; BMI: Body mass index; BBPS: Boston bowel preparation scale.

Table 2 Size of identified lesions

	Polyps		Adenomas
	RV	FV	RV	FV
≤ 5 mm	295	314	126	133
6-10 mm	143	81	113	80
> 10 mm	59	22	58	22

RV: Retroflexion view; FV: Forward view.

Table 3 Location of identified lesions

	Polyps		Adenomas
	RV	FV	RV	FV
Right colon	244	141	145	90
Left colon	186	181	125	105
Rectum	67	95	27	40

RV: Retroflexion view; FV: Forward view.

Table 4 Logistic regression analysis of predictors of failure to perform right-sided retroflexion

	Odds ratio (95%CI)	P value
Age > 65 yr	5.26 (2.17-12.8)	< 0.001
Female sex	2.92 (1.17-7.31)	0.022
Previous abdominal surgery	5.83 (2.26-15.04)	< 0.001
Instrumental looping	3.49 (1.33-9.12)	0.011

CI: Confidence interval.