How to predict adequate bowel preparation before colonoscopy using conventional polyethylene glycol: prospective observational study based on survey.
OBJECTIVE
The present study investigated the conditions and predictive factors for adequate bowel preparation using 4-L polyethylene glycol (PEG) preparation in clinical practice.


METHODS
We conducted a prospective-survey-based observational study. The survey consisted of 14 questions that assessed the preparation method (group 1: split method for morning colonoscopy; group 2: full-volume method for same-day afternoon colonoscopy; group 3: full-volume method for next-day morning colonoscopy), dinner type and timing the day before colonoscopy, elapsed time after PEG consumption, and stool character and defecation frequency immediately before colonoscopy. Preparation status was compared using the Boston bowel preparation scale (BBPS).


RESULTS
Total of 465 surveys (391 for group 1, 55 for group 2, 19 for group 3) were conducted. Mean BBPS score was highest in group 1 and lowest in group 3 (P < 0.001). Fasting dinner before colonoscopy group showed a higher mean BBPS than the diet group; eating before 6 p.m. and a low-residue diet showed a higher mean BBPS (P < 0.05). Defecation frequency (>5 times) was related to adequate preparation in the left colon and elapsed time (<5 h) to that in the right colon (P < 0.05). Liquid stool without solid material immediately before colonoscopy was related to adequate preparation (P < 0.001).


CONCLUSIONS
In bowel preparation with 4-L PEG, elapsed time after PEG consumption (<5 h), defecation frequency (>5 times) and liquid stool without solid material immediately before colonoscopy were predictive factors for adequate bowel preparation just before colonoscopy.
Institute for Digestive Research, Soonchunhyang University, College of Medicine, Seoul, Korea.
Hyun Gun
HG
Kim
Seong Ran
SR
Jeon
Mi Young
MY
Kim
Tae Hee
TH
Lee
Jun-Hyung
JH
Cho
Bong Min
BM
Ko
Jin-Oh
JO
Kim
Joo Young
JY
Cho
Joon Seong
JS
Lee
D002400:Cathartics / Q000494:pharmacology*; D003106:Colon; D003113:Colonoscopy / Q000379:methods*; D004032:Diet; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011092:Polyethylene Glycols / Q000494:pharmacology*; D011446:Prospective Studies; D013501:Surface-Active Agents / Q000494:pharmacology; D011795:Surveys and Questionnaires
D002400:Cathartics; D013501:Surface-Active Agents; D011092:Polyethylene Glycols
bowel preparation; colonoscopy; defecation frequency; polyethylene glycol; questionnaire