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OpenTrials
Active, Not Recruiting

NCT Number: NCT02877394

Use of a Squatting Assist Device in Patients With Constipation

Constipation is a very common problem. Western style toilets that are nearly universal in the United States require the person to sit on the toilet. However, results from uncontrolled studies suggests that a squatting posture (as prevalent in many foreign countries) may be better at facilitating evacuation compared to a Western style commode. One uncontrolled, unpublished study suggests that a footstool improved bowel symptoms in nearly 98% of 153 constipated participants. Hence, the investigators propose to evaluate the benefits of a footstool on symptoms and anorectal functions in constipated patients. Hypothesis: the regular squatting assist device (7 inches) but not a sham device (2 inches tall) will improve symptoms of constipation.

Active, Not Recruiting

This study is active but is not currently recruiting participants.

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Key information

Age range

18 year–80 year

Sex eligibility

Female

Study type

Interventional

Phase

Phase 2

Primary location

Mayo Clinic in Rochester

Rochester, Minnesota, 55905, United States

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Able to communicate adequately with the investigator and to comply with the requirements for the entire study
  • Meet Rome III criteria for functional constipation as assessed by questionnaires in period 1, i.e., report at least 2 of the following symptoms for last 3 months or more with symptom onset at least 6 months prior to diagnosis: a) <3 SBMs/week b) hard or lumpy stools ≥ 25% of time c) straining ≥ 25% of time d) sense of incomplete evacuation ≥ 25% of time e) feeling of anorectal blockage ≥ 25% of time or f) manual maneuvers to facilitate defecation ≥ 25% of time. Patients who meet Rome III criteria for irritable bowel syndrome will also be eligible provided they also meet above criteria.

Exclusion criteria

  • Clinical evidence of significant cardiovascular, respiratory, renal, hepatic, gastrointestinal. hematological, neurological, psychiatric or other disease that may interfere with the objectives of the study and/or pose safety concerns.
  • History of total, hemi- or subtotal colectomy at any time or other abdominal operations within 60 days prior to entry into the study. Segmental resection of the colon (e.g. sigmoid resection) for diverticulitis will be permitted.
  • Current or past history of colon or rectal cancer, scleroderma, inflammatory bowel disease, congenital anorectal abnormalities, rectal prolapse, solitary rectal ulcer syndrome, history of rectal resection or pelvic irradiation
  • Active cancer
  • Pregnant or nursing women, prisoners and institutionalized individuals
  • Weight > 300 lbs.
  • Current or Prior use of Squatty Potty®
  • Current use of opioid analgesics. Patients on opioids will be allowed to participate if they have discontinued them for at least 3 days (72 hrs.) before date of screening and are willing to stay off them for the duration of the study.
  • Current use of anticholinergics (e.g. nortriptyline, amitriptyline, hyoscyamine). Patients who use low dose tricyclic antidepressants (nortriptyline upto 50 mg/day or amitriptyline upto 25 mg/day ) will be eligible provided they do not increase the dose during the study period. Patients on higher doses or on other anticholinergics are eligible to participate if they can discontinue their medication at least 3 days (72 hrs) before the date of screening and are willing to stay off them till the study is complete.
  • Current use of laxatives (MiraLax, Ex-lax, senna, herbal supplements), linaclotide, lubiprostone, and prucalopride to treat constipation- patients using these medications will be eligible to participate if they can discontinue the medication at least 3 days (72 hrs.) before the date of screening and are willing to stay off them till the study is complete.

Treatment and study plan

Squatting Assist Device

Device

The Squatty Potty is a 7 inch tall stool to assist subjects in maintaining a squatting position while using a toilet. While sitting on the toilet, the subject supports her feet on the Squatty Potty.

Other names: Squatty Potty

Sham Squatting Assist Device

Device

This stool will be 2 inches tall and be similar in appearance to the Squatty Potty. While sitting on the toilet, the subject supports her feet on the 2 inch high stool.

Primary outcomes

  1. Mean Weekly Complete Spontaneous Bowel Movement (CSBM) Frequency

    Time frame: baseline, 4 weeks

    Subjects completed a bowel diary indicating the number of CSBMs they had each week. Weekly CSBM Frequency = (Number of CSBMs recorded in 7 days/Number of days with bowel entries in subject diary) X 7

Secondary outcomes

  1. Mean Weekly Spontaneous Bowel Movement (SBM) Frequency

    Time frame: Baseline; 4 weeks

    Subjects completed a bowel diary indicating the number of SBMs (bowel movements that occurred without requiring the use of a laxative or enema or of manual disimpaction) they had each week. Weekly SBM frequency= (Number of SBMs recorded in 7 days /Number of days with bowel entries) X 7

  2. Mean Bristol Stool Form Score (BSFS)

    Time frame: Baseline; 4 weeks

    The Bristol Stool Scale classifies human stool into seven types, ranging from hard lumps (1) indicating constipation to watery stools (7) indicating diarrhea. Total scores range from 1 to 7 with higher scores indicating less constipation.

  3. Straining Severity Score

    Time frame: Baseline; 4 weeks

    Straining severity score was measured using a 5-point scale. Total scores ranged from 1 to 5 with higher scores indicating more severe straining.

  4. Worst Abdominal Bloating Score

    Time frame: Baseline; 4 Weeks

    Worse abdominal bloating score was measured using a 5-point scale. Total scores ranged from 1 to 5 with higher scores indicating more abdominal bloating.

  5. Average Overall Relief of Constipation Score

    Time frame: Week 2, Week 3, Week 4

    Overall relief of constipation score was measured using a 7-point scale. Scores ranged from 1 (considerably relieved) to 7 (significantly worse) with higher scores indicating worse overall relief. The average scores were calculated through week 2, week 3 and week 4 then combined for a total overall average relief score divided by 3.

  6. Adequate Relief of Constipation

    Time frame: Week 1, Week 2, Week 3, Week 4

    The number of subjects who reported adequate relief of constipation for ≥ 3 of 4 weeks during treatment period

  7. Satisfaction With Effects of the Foot Stool on Bowel Symptoms

    Time frame: 4 Weeks

    Satisfaction was rated on a 5-point scale from 1 (not at all satisfied) to 5 (very satisfied). Total score ranges from 1-5 with higher scores indicating higher satisfaction.

  8. Perceived Improvement in Constipation With Foot Stool Use

    Time frame: 4 Weeks

    Perceived improvement in constipation with foot stool use was measured using a 100-point scale. Scores ranged from 0 (no improvement) to 100 (extremely improved) with higher scores indicating higher perceived improvement.

Sponsors and collaborators

Lead sponsor

Mayo Clinic

Other

Registry information

Important dates

Study start
2016
Primary completion
2025
Study completion
2026
First posted
Aug 24, 2016
Registry last updated
Jul 28, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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