Table 3. Analysis of patients undergoing colonoscopy with and without sedation.

Factor		Sedation (SC) n = 1500		No Sedation (NSC) n = 194		OR [CI]	P value
Age (years)		64 (14)		63 (15)		–	0.283
Time taken (minutes)		29 (13)		32 (18)		–	0.590
Sex	Male	694 (46)		119 (61)			< 0.001
	Female	806 (54)		75 (39)
		Number	%	Number	%
Referral	Routine	922	62	101	52	–	0.026
	Urgent	558	37	88	45
	Unknown	20	1	5	3
Hospital	A	539	36	96	49	–	< 0.0001
	B	491	33	63	33
	C	470	31	35	18
ASA	1	438	29	28	14	–	0.0003
	2	448	30	56	29
	3	478	32	85	44
	4	113	8	22	11
	Unknown	23	1	3	2
Therapeutic		385	26	40	21	0.8 [0.5 – 1.1]	0.128
Inpatient		673	45	84	43	0.9 [0.7 – 1.3]	0.680
Screening		31	21	7	4	1.8 [0.8 – 4.1]	0.178
Surveillance		161	11	22	11	1.1 [0.7 – 1.7]	0.798
Indication1	Bleeding	317	21	54	28	1.4 [1.0 – 2.0]	0.034
	Anemia	125	8	6	3	0.4 [0.2 – 0.8]	0.014
	CIBH	297	20	51	26	1.4 [1.0 – 2.0]	0.036
Previous Resection(s)		45	3	9	5	1.6 [0.8 – 3.3]	0.225
Pathology2	Polyps	351	23	51	26	1.2 [0.9 – 1.7]	0.249
	Inflammation	115	8	6	3	0.4 [0.2 – 0.9]	0.025
Done by 2nd endoscopist		217	15	29	15	1.0 [0.7 – 1.6]	0.858
Failed cecal intubation		153	10	22	11	1.1 [0.7 – 1.8]	0.624
Adjusted cecal intubation		1391	93	185	95	1.6 [0.8 – 3.2]	0.180
Discomfort	None	521	35	84	43	–	< 0.001
	Minimal	529	35	57	29
	Mild	269	18	25	13
	Moderate	150	10	9	5
	Severe	0	0	0	0
	Unrecorded	31	2	19	10
Complications		30	2	2	1	–	0.351
	Poorly tolerated	25		2
	Damaged scope	3		0
	Bleeding	2		0

Age and time expressed as average (standard deviation). Significant values were P < 0.05, derived by Chi-square test, t-test or Mann-Whitney. Odds ratio were obtained by univariate analysis.

CIBH: change in bowel habit

¹Only indications with significant P values are shown

²No significant differences were found for diverticular disease, strictures or radiation proctitis.