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Implementation of a Defecation Posture Modification Device

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The goal of this study was to evaluate the influence of defecation postural modification devices (DPMDs) on normal bowel patterns.


The introduction of DPMDs has brought increased awareness to bowel habits in western populations.

Materials and Methods:

A prospective crossover study of volunteers was performed that included real-time collection of data regarding bowel movements (BMs) for 4 weeks (first 2 wk without DPMD and subsequent 2 wk with DPMD). Primary outcomes of interest included BM duration, straining, and bowel emptiness with and without DPMD use.


In total, 52 participants (mean age, 29 y and 40.1% female) were recruited for this study. At baseline 15 subjects (28.8%) reported incomplete emptying, 23 subjects (44.2%) had increased straining, and 29 subjects (55.8%) noticed blood on their toilet paper in the past year. A total of 1119 BMs were recorded (735 without DPMD and 384 with DPMD). Utilizing the DPMD resulted in increased bowel emptiness (odds ratio, 3.64; 95% confidence interval (CI), 2.78-4.77) and reduced straining patterns (odds ratio, 0.23; 95% CI, 0.18-0.30). Moreover, without the DPMD, participants had an increase in BM duration (fold increase, 1.25; 95% CI, 1.17-1.33).


DPMDs positively influenced BM duration, straining patterns, and complete evacuation of bowels in this study.
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Keywords: bowel duration; bowel emptiness; defecation postural modification device (DPMD); straining patterns

Document Type: Research Article

Affiliations: 1: Department of Internal Medicine 2: Division of Biostatistics, College of Public Health, The Ohio State University, Columbus, OH 3: Division of Gastroenterology, Hepatology and Nutrition, The Ohio State University Medical Center

Publication date: March 1, 2019

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