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CompletedNCT00687830CCFUpdated May 17, 2017Results posted

Efficacy of Morning-only Bowel Preparation for Afternoon Colonoscopy.

A Phase 3 interventional study of Polyethylene Glycol afternoon and Polyethylene Glycol morning in Colon Cancer, sponsored by Cleveland Clinic Florida. Completed at 1 site in United States. Per ClinicalTrials.gov, last updated 2017-05-17.

Sponsored by Cleveland Clinic Florida · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
136
Allocation
Randomized
Sex
All
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Study summary

The study aims to study the adequacy of bowel preparation (colon cleansing) for afternoon colonoscopies. The conventional regimen of giving bowel prep on the evening prior to the day of the colonoscopy will be compared with that given on the morning of an afternoon colonoscopy. Endoscopist scoring the bowel cleansing efficacy with an Ottawa Scale are blinded to the randomization process.

Read the detailed description

Two bowel preparation regimens of Polyethylene Glycol (PEG), commonly referred to as "Golytely" will be tested for their efficacy (bowel cleansing effect) and patient tolerability. The goal is to reduce the failure rates of afternoon colonoscopies, for which, one of the main reasons attributed is inadequate bowel preparation. For the afternoon colonoscopies, the conventional PEG regimen given on the evening prior to the day of the colonoscopy will be compared with the novel PEG regimen given on the morning of the day of the colonoscopy. The comparison will be drawn for two measures - bowel cleansing effect measured from the questionnaire given to the gastroenterologists performing the colonoscopy and the patient tolerability evaluated from the information gathered from the patient's questionnaire.

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Conditions studied

  • Colon Cancer

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Keywords

  • Afternoon colonoscopy
  • Morning
  • Evening
  • Bowel Preparation
  • Efficacy
  • Satisfaction
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In context

Colonic Neoplasms

1,432 studies on the registry are indexed under Colonic Neoplasms; 357 are open to participants now.

This study's enrollment of 136 is above the median of 90 across 1,034 interventional studies indexed under Colonic Neoplasms.

Browse Colonic Neoplasms studies →

Lead sponsor

Cleveland Clinic Florida is the lead sponsor of 7 studies on the registry; none are open to participants now.

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

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Who can participate

Ages eligible
Child (0–17), Adult (18–64), Older adult (65+)
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • All patients attending the GI Clinic at CCF who are prescribed colonoscopy and are willing to get the procedure done in the afternoon.

Exclusion criteria

Exclusion Criteria:

  • Colonoscopy is contraindicated
  • Prior Colectomy or colon surgery.
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Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Care provider)
Enrollment
136 participants (actual)

Study arms

  • Active comparator
    Polythylene Glycol (PEG) in the evening

    Bowel preparation with Polyethylene Glycol given in the evening prior to the day of the afternoon colonoscopy. 'Polyethylene Glycol afternoon'

    Drug: Polyethylene Glycol afternoon

  • Experimental
    Polythylene Glycol (PEG) in the Morning

    Bowel preparation with Polyethylene Glycol given on the morning of the day of the afternoon colonoscopy. 'Polyethylene Glycol morning'

    Drug: Polyethylene Glycol morning

Interventions

  • DrugPolyethylene Glycol afternoon

    Prescribed the standard dose of 4L or 1 Gallon Polythylene Glycol to be taken over a period of 4 hours with water. For Evening prep, between 5PM and 9PM

    Also known as: GoLytely

  • DrugPolyethylene Glycol morning

    Prescribed the standard dose of 4L or 1 Gallon Polythylene Glycol to be taken over a period of 4 hours with water. For Morning prep, between 6AM and 10AM

    Also known as: Golytely

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What researchers measure

Primary outcomes

  1. Comparing All Morning Bowel Prep to Evening Bowel Prep for Patients Undergoing Afternoon Colonoscopies. (Using Ottawa Scale Scores, Range 0-14) Lower Score Indicates a Better Outcome.

    Time frame: Within 1 hr after the colonoscopy procedure

Secondary outcomes

  1. Patient Satisfaction in the Two Groups, All Morning Prep vs. All Evening Bowel Prep.

    Variable used to assess patient satisfaction: Loss of sleep. The numbers below depict the number of participants who experienced loss of sleep.

    Time frame: An hour before the colonoscopy procedure

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Results

Posted Apr 11, 2016

Participant flow

Participant flow — Overall Study
MilestoneEveningMorning
Started6868
Completed6868
Not completed00

Outcome measures

PrimaryComparing All Morning Bowel Prep to Evening Bowel Prep for Patients Undergoing Afternoon Colonoscopies. (Using Ottawa Scale Scores, Range 0-14) Lower Score Indicates a Better Outcome.
Time frame:
Within 1 hr after the colonoscopy procedure
Reported as:
Mean · units on a scale
Comparing All Morning Bowel Prep to Evening Bowel Prep for Patients Undergoing Afternoon Colonoscopies. (Using Ottawa Scale Scores, Range 0-14) Lower Score Indicates a Better Outcome.
units on a scaleEveningMorning
Comparing All Morning Bowel Prep to Evening Bowel Prep for Patients Undergoing Afternoon Colonoscopies. (Using Ottawa Scale Scores, Range 0-14) Lower Score Indicates a Better Outcome.7.1 ± 2.74.7 ± 2.4
Statistical analysis
  • Evening vs Morning · t-test, 2 sided · p = <0.01
SecondaryPatient Satisfaction in the Two Groups, All Morning Prep vs. All Evening Bowel Prep.

Variable used to assess patient satisfaction: Loss of sleep. The numbers below depict the number of participants who experienced loss of sleep.

Time frame:
An hour before the colonoscopy procedure
Reported as:
Number · participants
Patient Satisfaction in the Two Groups, All Morning Prep vs. All Evening Bowel Prep.
participantsEveningMorning
Patient Satisfaction in the Two Groups, All Morning Prep vs. All Evening Bowel Prep.2111
Statistical analysis
  • Evening vs Morning · Chi-squared · p = 0.04

Adverse events

Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Evening—0/68 (0%)0/68 (0%)
Morning—0/68 (0%)0/68 (0%)

Baseline characteristics

Age, Continuous
Age, Continuous(years)EveningMorningTotal
Mean52.2 ± 11.551.4 ± 10.251.8 ± 10.8
Sex: Female, Male
Sex: Female, Male(Participants)EveningMorningTotal
Female303565
Male383371
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Study locations

1 site
  • Cleveland Clinic Florida
    Weston, Florida 33331, United States
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References and documents

Publications

  • Varughese S, Kumar AR, George A, Castro FJ. Morning-only one-gallon polyethylene glycol improves bowel cleansing for afternoon colonoscopies: a randomized endoscopist-blinded prospective study. Am J Gastroenterol. 2010 Nov;105(11):2368-74. doi: 10.1038/ajg.2010.271. Epub 2010 Jul 6. PubMed 20606677 ↗

Individual participant data

Plan to share: No

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on May 17, 2017, 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
NCT00687830
Lead sponsor
Cleveland Clinic Florida
Responsible party
Sponsor
First posted
Jun 2, 2008
Start date
Feb 2008
Primary completion
Jul 2009
Completion
Nov 2009
Results posted
Apr 11, 2016
Last update
May 17, 2017

Study contacts

Shibu Varughese, M.D.
principal investigator · Cleveland Clinic Florida

Oversight

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

Not currently enrolling

This study is completed, as verified in Feb 2016. You cannot join it, but the record below documents what was studied.

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