Factors associated with incomplete colonoscopy at a Japanese academic hospital

Table 5 Age-adjusted and multivariable-adjusted analysis for complete cecal intubation rate in women

	n	Complete rate	P value1	Age-adjusted2			Multivariable-adjusted3
				OR	95%CI	P value	OR	95%CI	P value
Total	4126	94.0%
Age (yr)
< 60	2013	94.4%		1.00			1
≥ 60	2113	93.6%	0.3257	1.15	0.89-1.49	0.2951	1.13	0.87-1.48	0.3558
Poor bowel cleansing
-	3886	94.5%		1.00			1
+	240	85.0%	< 0.0001	3.03	2.07-4.44	< 0.0001	3.09	2.11-4.54	< 0.0001
History of abdominal or pelvic surgery
-	2940	94.9%		1.00			1
+	1186	91.7%	0.0002	1.66	1.27-2.16	0.0002	1.71	1.31-2.24	< 0.0001
Melanosis coli
-	3867	94.0%		1.00
+	259	94.6%	0.7872	0.86	0.50-1.51	0.6052	NS
Inflammatory bowel disease
-	3680	94.1%		1.00
+	446	93.3%	0.5262	1.25	0.82-1.90	0.2964	NS
Experience of colonoscopist (yr)
< 15	1798	94.0%		1.00
≥ 15	2320	94.0%	1	1.01	0.78-1.30	0.9653	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.