Defecation frequency and timing, and stool form in the general population: a prospective study

Area of Science:

• Gastroenterology
• Public Health
• Epidemiology

Background:

• The spectrum of normal bowel habits and stool types in the general population remains largely uncharacterized.
• Understanding community-based bowel function is crucial for identifying deviations and potential health concerns.

Purpose of the Study:

• To investigate the range of bowel habits and stool consistency in a representative community sample.
• To determine the prevalence of regular bowel movements and identify factors influencing bowel function.

Main Methods:

• A random stratified sample of 838 men and 1059 women from East Bristol participated.
• Participants recorded three consecutive defecations, noting stool form using a validated six-point scale.
• Questionnaire data was compared with recorded defecation patterns.

Main Results:

• The most common bowel habit (once daily) was practiced by a minority; only 40% of men and 33% of women had a regular 24-hour cycle.
• Irregular bowel habits were prevalent, with one-third of women defecating less than daily.
• Constipated stools were more frequent in women, especially those of childbearing age, who also showed a higher incidence of slow transit constipation.

Conclusions:

• Conventionally normal bowel function is experienced by less than half the surveyed population.
• Bowel habits and stool types vary significantly, with younger women being particularly disadvantaged regarding regularity and stool consistency.
• The study highlights a need for further investigation into the factors influencing these observed patterns in bowel function.