Limited water infusion decreases pain during minimally sedated colonoscopy

Table 1 Baseline characteristics of the patients undergoing colonoscopy (mean ± SD) n (%)

	Air group (n = 89)	Water group (n = 90)	P value
Male	51 (57.3)	49 (54.4)	0.7642
Age (yr)	58.3 ± 13.3	57.2 ± 13.3	0.6121
BMI (kg/m2)	24.0 ± 3.5	24.2 ± 3.5	0.6781
Previous abdomino-pelvic surgery	27 (36.0)	23 (30.7)	0.6042
Constipation	34 (38.2)	22 (24.4)	0.0542
Inpatients	5 (5.6)	3 (3.3)	0.4972
Indications			0.4822
Follow-up of polyps	34 (38.2)	29 (32.2)
Abdominal pain	5 (5.6)	9 (10.0)
Rectal bleeding	13 (14.6)	11 (12.2)
Stool occult blood	12 (13.5)	18 (20.0)
Change of bowel habit	16 (18.0)	18 (20.0)
Anemia	3 (3.4)	1 (1.1)
Loss of body weight	3 (3.4)	3 (3.3)
Other	3 (3.4)	1 (1.1)
Education level			0.9692
Primary school and less	21 (24.1)	21 (24.4)
High school	38 (42.7)	40 (44.4)
College and higher	30 (34.5)	29 (33.7)
Bowel cleansing regimens			0.1792
Sodium phosphate	41 (46.1)	51 (56.7)
Magnesium citrate-bisacodyl	48 (53.9)	39 (43.3)
Anxiety	3.0 ± 2.9	3.9 ± 2.9	0.1101
Antispasmodic agent use	72 (80.9)	75 (83.3)	0.7002
Colon preparation			0.2762
Good	49 (55.1)	60 (66.7)
Fair	25 (28.1)	18 (20.2)
Poor	15 (16.9)	12 (13.3)

¹Student’s t-test;

²χ² test. BMI: Body mass index.