Factors associated with incomplete colonoscopy at a Japanese academic hospital

Table 4 Age-adjusted and multivariable-adjusted analysis for complete cecal intubation rate in men

	n	Complete rate	P value1	Age-adjusted2			Multivariable-adjusted3
				OR	95% CI	P value	OR	95% CI	P value
Total	7686	95.6%
Age (yr)
< 60	3625	96.7%		1.00			1.00
≥ 60	4061	94.5%	< 0.0001	1.71	1.36-2.15	< 0.0001	1.74	1.35-2.23	< 0.0001
Poor bowel cleansing
-	7333	96.3%		1.00			1.00
+	353	79.9%	< 0.0001	6.11	4.58-8.17	< 0.0001	5.89	4.39-7.90	< 0.0001
History of abdominal or pelvic surgery
-	6455	95.9%		1.00			1.00
+	1231	93.7%	0.0015	1.44	1.10-1.87	0.0073	1.51	1.15-1.99	0.003
Melanosis coli
-	7507	95.6%		1.00
+	179	93.9%	0.2674	1.23	0.66-2.29	0.5222	NS
Inflammatory bowel disease
-	6933	95.6%		1.00			1.00
+	753	94.7%	0.2263	1.69	1.18-2.43	0.0045	1.57	1.08-2.28	0.017
Experience of colonoscopist (yr)
< 15	3662	95.6%		1.00
≥ 15	4009	95.6%	0.9557	0.98	0.79-1.22	0.8348	NS

¹Fisher's exact test;

²Age-adjusted for sex; sex-adjusted for age;

³Multivariable-adjusted OR in stepwise logistic regression model, where age and sex were forced to enter into the model; other significant factors were selected from history of abdominal or pelvis surgery, poor bowel preparation, and inflammatory bowel disease with P < 0.05 for entry and removal. -: Not entered into the model to avoid multicollinearity; NS: Not selected.