Table 5. Odds ratio (OR) for adverse events in a multivariable logistic regression model adjusting for gender, age, caecum intubation failure, patient reported pain, type of colonoscopy (CS) and modelled registration completeness categories.

		Unadjusted OR		Adjusted OR
	No. of CS	Mean (95 % CI)	P -value	Mean (95 % CI)	P value
Gender 1
Men	3408	1.0 (reference)		1.0 (reference)
Women	3780	1.0 (0.7 – 1.5)	0.91	0.6 (0.4 – 1.0)	0.07
Age 1	7186	1.0 (1.0 – 1.0)	0.31	1.0 (1.0 – 1.0)	0.13
Complete examination
Cecum or aim reached	7057	1.0 (reference)		1.0 (reference)
Cecum intubation failure	152	2.2 (0.9 – 5.4)	0.10	3.0 (1.0 – 8.9)	0.46
Pain 2
None, slight/moderate pain	4592	1.0 (reference)		1.0 (reference)
Severe pain	631	1.8 (1.1 – 3.0)	0.02	1.8(1.0 – 3.3)	0.65
Type of colonoscopy 1
Diagnostic	3867	1.0 (reference)		1.0 (reference)
Therapeutic	1198	1.8 (1.1 – 2.8)	0.01	1.3 (0.8 – 2.3)	0.31
Percentage completeness
< 50 %	3557	1.0 (reference)		1.0 (reference)
50 %-69 %	1501	1.1 (0.6 – 2.0)	0.69	0.8 (0.4 – 1.9)	0.64
70 %-89 %	1412	2.1 (1.3 – 3.4)	0.003	2.6 (1.4 – 4.8)	0.003
≥ 90 %	739	3.5 (2.1 – 5.8)	< 0.001	3.6 (1.8 – 7.1)	< 0.001

¹Figures do not add up to 7209 due to missing data

²These add up to 5223 – the total number of filled-in patient reply forms after 7209 colonoscopies