When and why a colonoscopist should discontinue colonoscopy by himself?

Table 4 Factors related to sites for colonoscope reaching left hemicolon and right hemicolon

	Left hemicolon			Right hemicolon
	OR	95%CI	P value	OR	95%CI	P value
Preoperative variable
Sex (female vs male)	0.69	0.41-1.17	0.17	0.35	0.20-0.63	< 0.001
Age (> vs ≤ 60 yr)	1.63	0.95-2.80	0.08	0.88	0.50-1.52	0.64
Anesthesia (yes vs no)	0.74	0.43-1.30	0.30	0.98	0.55-1.75	0.93
Type of colonoscope (yes vs no)	0.88	0.50-1.53	0.64	1.11	0.62-2.00	0.72
Intraoperative variable
Fixation (yes vs no)	0.06	0.03-0.16	< 0.001	0.16	0.06-0.39	< 0.001
Tortuosity (yes vs no)	0.04	0.02-0.08	< 0.001	0.23	0.13-0.43	< 0.001
Laxity (yes vs no)	0.56	0.24-1.33	0.19	1.16	0.50-2.71	0.73
Redundancy (yes vs no)	0.80	0.21-3.10	0.75	0.12	0.05-0.26	< 0.001