Factors associated with incomplete colonoscopy at a Japanese academic hospital

Table 3 Age- and sex-adjusted and multivariable-adjusted analysis for complete cecal intubation rate

	n	Complete rate	P value1	Age- and sex-adjusted2			Multivariable-adjusted3
				OR	95%CI	P value	OR	95%CI	P value
Total	11812	95.0%
Sex
Male	7686	95.6%		1.00			1.00
Female	4126	94.0%	< 0.0001	1.38	1.17-1.64	0.0002	1.20	1.01-1.43	0.0377
Age (yr)
< 60	5638	95.9%		1.00			1.00
≥ 60	6174	94.2%	< 0.0001	1.44	1.22-1.71	< 0.0001	1.48	1.23-1.79	< 0.0001
Poor bowel cleansing
-	11219	95.7%		1.00			1.00
+	593	82.0%	< 0.0001	4.64	3.69-5.84	< 0.0001	4.57	3.62-5.76	< 0.0001
History of abdominal or pelvic surgery
-	9395	95.6%		1.00			1.00
+	2417	92.8%	< 0.0001	1.55	1.28-1.86	< 0.0001	1.65	1.36-1.99	< 0.0001
Melanosis
-	11374	95.0%		1.00
+	438	94.3%	0.5012	0.99	0.65-1.50	0.9503
Inflammatory bowel disease
-	10613	95.1%		1.00			1.00
+	1199	94.2%	0.1617	1.48	1.13-1.95	0.0048	1.45	1.10-1.92	0.0091
Experience of colonoscopist (yr)
< 15	5460	95.04%		1.00
≥ 15	6329	95.0%	0.9324	0.99	0.84-1.17	0.9256

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.