A randomized controlled trial of an educational video to improve quality of bowel preparation for colonoscopy.
BACKGROUND
High-quality bowel preparation is necessary for colonoscopy. A few studies have been conducted to investigate improvement in bowel preparation quality through patient education. However, the effect of patient education on bowel preparation has not been well studied.


METHODS
A randomized and prospective study was conducted. All patients received regular instruction for bowel preparation during a pre-colonoscopy visit. Those scheduled for colonoscopy were randomly assigned to view an educational video instruction (video group) on the day before the colonoscopy, or to a non-video (control) group. Qualities of bowel preparation using the Ottawa Bowel Preparation Quality scale (Ottawa score) were compared between the video and non-video groups. In addition, factors associated with poor bowel preparation were investigated.


RESULTS
A total of 502 patients were randomized, 250 to the video group and 252 to the non-video group. The video group exhibited better bowel preparation (mean Ottawa total score: 3.03 ± 1.9) than the non-video group (4.21 ± 1.9; P < 0.001) and had good bowel preparation for colonoscopy (total Ottawa score <6: 91.6 % vs. 78.5 %; P < 0.001). Multivariate analysis revealed that males (odds ratio [OR] = 1.95, P = 0.029), diabetes mellitus patients (OR = 2.79, P = 0.021), and non-use of visual aids (OR = 3.09, P < 0.001) were associated with poor bowel preparation. In the comparison of the colonoscopic outcomes between groups, the polyp detection rate was not significantly different between video group and non-video group (48/250, 19.2 % vs. 48/252, 19.0 %; P = 0.963), but insertion time was significantly short in video group (5.5 ± 3.2 min) than non-video group (6.1 ± 3.7 min; P = 0.043).


CONCLUSIONS
The addition of an educational video could improve the quality of bowel preparation in comparison with standard preparation method.


BACKGROUND
Clinical Research Information Service KCT0001836 . The date of registration: March, 08(th), 2016, Retrospectively registered.
Digestive Disease Center, Department of Internal Medicine, Inha University School of Medicine, 27 Inhang-ro, Jung-gu, Incheon, 400-711, South Korea.
Jin-Seok
JS
Park
Digestive Disease Center, Department of Internal Medicine, Inha University School of Medicine, 27 Inhang-ro, Jung-gu, Incheon, 400-711, South Korea.
Min Su
MS
Kim
Digestive Disease Center, Department of Internal Medicine, Inha University School of Medicine, 27 Inhang-ro, Jung-gu, Incheon, 400-711, South Korea. Kimhg@inha.ac.kr.
HyungKil
H
Kim
Digestive Disease Center, Department of Internal Medicine, Inha University School of Medicine, 27 Inhang-ro, Jung-gu, Incheon, 400-711, South Korea.
Shin Il
SI
Kim
Digestive Disease Center, Department of Internal Medicine, Inha University School of Medicine, 27 Inhang-ro, Jung-gu, Incheon, 400-711, South Korea.
Chun Ho
CH
Shin
Digestive Disease Center, Department of Internal Medicine, Inha University School of Medicine, 27 Inhang-ro, Jung-gu, Incheon, 400-711, South Korea.
Hyun Jung
HJ
Lee
Digestive Disease Center, Department of Internal Medicine, Inha University School of Medicine, 27 Inhang-ro, Jung-gu, Incheon, 400-711, South Korea.
Won Seop
WS
Lee
Digestive Disease Center, Department of Internal Medicine, Inha University School of Medicine, 27 Inhang-ro, Jung-gu, Incheon, 400-711, South Korea.
Soyoung
S
Moon
D000328:Adult; D002400:Cathartics / Q000008:administration & dosage*; D003111:Colonic Polyps / Q000175:diagnosis; D003113:Colonoscopy / Q000379:methods*; D004733:Enema; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017063:Outcome Assessment, Health Care; D010353:Patient Education as Topic / Q000379:methods*; D011446:Prospective Studies; D014741:Video Recording
D002400:Cathartics
Bowel preparation; Colonoscopy; Video