The timing of bowel preparation before colonoscopy determines the quality of cleansing, and is a significant factor contributing to the detection of flat lesions: A randomized study

Table 5 Comparison of the tolerance variables in the four groups n (%)

Side effect	Group 1	Group 2	Group 3	Group 4	P
Nausea	17 (39.5)	24 (53.3)	24 (53.3)	15 (34.1)	NS
Vomiting	4 (9.3)	10 (22.2)	10 (22.2)	8 (18.2)	NS
Disgusting1	10 (23.3)	12 (26.7)	12 (26.7)	12 (27.3)	NS
Thirst1	6 (13.9)	9 (20.0)	9 (20)	12 (27.2)	NS
Abdominal pain1	4 (9.3)	4 (8.9)	3 (6.6)	5 (11.4)	NS
Anal pain1	1 (2.3)	4 (8.9)	1 (2.2)	2 (4.5)	NS

¹As moderate or severe.