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CompletedNCT02300779DIMEPREPUpdated Apr 12, 2016

Diet for Colonoscopy Preparation in Diabetic Patients

A Phase 3 interventional study of Low-residue diet and Usual care in Diabetes Mellitus and Colonic Diseases, sponsored by Parc de Salut Mar. Completed at 2 sites in Spain. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2016-04-12.

Sponsored by Parc de Salut Mar · Phase 3, Interventional, and Supportive care

Phase
Phase 3
Study type
Interventional
Enrollment
150
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

This trial will compare the efficacy of to 2 different sets of dietary recommendations to be followed before colon cleansing for colonoscopy in diabetic patients.

Read the detailed description

Consecutive diabetic patients undergoing an ambulatory colonoscopy at the participating sites will be randomized to follow one of two different sets of dietary recommendations. The experimental group will be asked to start a low-residue diet 4 days before the procedure, during which the therapy for diabetes will be adjusted. The control group will be asked to follow a low-residue diet for 3 days followed by a liquid diet during the day before the procedure, and no adjustments will be made to their usual treatment.

Colon cleansing will be undertaken with polyethylene glycol (4 liters in the usual split administration scheme) in both groups.

Analogic visual scales and standardized questionnaires on various aspects that may influence the degree of satisfaction about the preparation will be answered by the participants and collected before the colonoscopy. The endoscopist, blinded to the preparation method, will grade the adequacy of the preparation. Adverse events will be recorded up to 1 month after the procedure

02

Conditions studied

  • Diabetes Mellitus
  • Colonic Diseases

Keywords

  • Colonoscopy
  • Diabetes Mellitus
  • Diet
  • Polyethylene glycols
  • Efficacy
  • Personal satisfaction
03

In context

Colonic Diseases

142 studies on the registry are indexed under Colonic Diseases; 22 are open to participants now.

This study's enrollment of 150 is close to the median of 143 across 93 interventional studies indexed under Colonic Diseases.

Browse Colonic Diseases studies →

Lead sponsor

Parc de Salut Mar is the lead sponsor of 180 studies on the registry; 27 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Patients scheduled for a diagnostic, screening or follow-up outpatient colonoscopy
  • Diabetes mellitus (being treated with insulin or any oral agent).

Exclusion criteria

Exclusion Criteria:

  • Unwillingness to participate.
  • Hospital admission at the time of colonoscopy.
  • Inability to follow instructions
  • Active inflammatory bowel disease
  • Previous colectomy.
  • Incomplete colonoscopies due to technical reasons or contraindication for the procedure as evaluated by the endoscopist
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Study design

Phase
Phase 3
Primary purpose
Supportive care
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Care provider)
Enrollment
150 participants (actual)

Study arms

  • Experimental
    Low-residue diet

    Subjects will follow a low-residue diet for 4 days. Their usual treatment for diabetes will be adjusted to the degree of glycemic control.

    Dietary Supplement: Low-residue diet

  • Active comparator
    Usual care

    Subjects will follow a low-residue diet for 3 days (from 4 to 2 days before the procedure) and a liquid diet on the following day (the one before the procedure). No changes in their treatment for diabetes will be made

    Dietary Supplement: Usual care

Interventions

  • Dietary supplementLow-residue diet

    Subjects will be instructed by members of the research team to follow a low-residue diet for 4 days. Bowel cleansing will begin at 9:00 pm on the evening before the colonoscopy is scheduled. Participants will take 8 sachets of the investigational product and take their contents diluted in 2 liters of water. Eight other sachets, also diluted in 2 liters of water will be taken 4 to 5 hours before the procedure. Fasting will be required from 2 hours after the bowel cleansing is complete. Their usual treatment for diabetes (whether insulin or an oral agent) will be adjusted.

  • Dietary supplementUsual care

    Subjects will be instructed by members of the research team to follow a low-residue diet for 3 days followed by a liquid-only diet for an additional day. Bowel cleansing will begin at 9:00 pm on the evening before the colonoscopy is scheduled. Participants will take 8 sachets of the investigational product and take their contents diluted in 2 liters of water. Eight other sachets, also diluted in 2 liters of water will be taken 4 to 5 hours before the procedure. Fasting will be required from 2 hours after the bowel cleansing is complete. No modifications in their usual treatment will be made.

06

What researchers measure

Primary outcomes

  1. Efficacy of the bowel preparation

    Rating of the Boston Bowel Preparation Scale (BBPS) by the endoscopist

    Time frame: 1 hour after the colonoscopy

Secondary outcomes

  1. Cecal intubation

    Ratio of successful cecal intubations in each study arm

    Time frame: 1 hour after the colonoscopy

  2. Polyp and adenoma detection

    Ratio of polyps and adenomas detected in each study arm

    Time frame: 1 hour after the colonoscopy

  3. Symptomatic hypoglycemia

    Each participant will report his/her experience in a questionnaire

    Time frame: 6 hours after finishing bowel preparation

  4. Abdominal pain, nausea, hunger and bloating

    Each participant will rate his/her experience in an analogue visual scale

    Time frame: 6 hours after finishing bowel preparation

  5. Adverse events

    Description of all spontaneously reported adverse events.

    Time frame: 30 days after the colonoscopy

  6. Adherence to the planned bowel cleansing method (questionnaire)

    Each participant will rate his/her experience in a questionnaire.

    Time frame: 6 hours after finishing bowel preparation

  7. Acceptability of the preparation (interference with work, leisure activities or sleep

    Each participant will rate his/her experience in a questionnaire.

    Time frame: 6 hours after finishing bowel preparation

  8. Predictors of inadequate bowel preparation

    Independent predictors will be identified by multivariate analysis

    Time frame: Baseline

07

Study locations

2 sites
  • Hospital Germans Trias i Pujol
    Badalona, Barcelona 08916, Spain
  • Hospital del Mar
    Barcelona, 08003, Spain
08

References and documents

Publications

  • Taylor C, Schubert ML. Decreased efficacy of polyethylene glycol lavage solution (golytely) in the preparation of diabetic patients for outpatient colonoscopy: a prospective and blinded study. Am J Gastroenterol. 2001 Mar;96(3):710-4. doi: 10.1111/j.1572-0241.2001.03610.x. PubMed 11280539 ↗
  • Ozturk NA, Gokturk HS, Demir M, Erdogan D, Unler GK, Gur G, Yilmaz U. The effect of autonomous neuropathy on bowel preparation in type 2 diabetes mellitus. Int J Colorectal Dis. 2009 Dec;24(12):1407-12. doi: 10.1007/s00384-009-0757-4. Epub 2009 Jul 7. PubMed 19582466 ↗
  • Chung YW, Han DS, Park KH, Kim KO, Park CH, Hahn T, Yoo KS, Park SH, Kim JH, Park CK. Patient factors predictive of inadequate bowel preparation using polyethylene glycol: a prospective study in Korea. J Clin Gastroenterol. 2009 May-Jun;43(5):448-52. doi: 10.1097/MCG.0b013e3181662442. PubMed 18978506 ↗
  • Alvarez-Gonzalez MA, Flores-Le Roux JA, Seoane A, Pedro-Botet J, Carot L, Fernandez-Clotet A, Raga A, Pantaleon MA, Barranco L, Bory F, Lorenzo-Zuniga V. Efficacy of a multifactorial strategy for bowel preparation in diabetic patients undergoing colonoscopy: a randomized trial. Endoscopy. 2016 Nov;48(11):1003-1009. doi: 10.1055/s-0042-111320. Epub 2016 Aug 4. PubMed 27490086 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Apr 12, 2016, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT02300779
Lead sponsor
Parc de Salut Mar
Collaborators
Germans Trias i Pujol Hospital
Responsible party
Marco Antonio Alvarez Gonzalez (MD, Parc de Salut Mar) — Principal investigator
First posted
Nov 25, 2014
Start date
Dec 2014
Primary completion
Jul 2015
Completion
Oct 2015
Last update
Apr 12, 2016

Study contacts

Marco Antonio Alvarez González, MD, PhD
principal investigator · Parc de Salut Mar

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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