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Risk Factors for Hemorrhoids on Screening Colonoscopy
Anne F Peery1, Robert S Sandler1, Joseph A Galanko1
1University of North Carolina School of Medicine, Chapel Hill, NC, United States of America.
Insights
Constipation increases hemorrhoid risk, while high grain fiber intake and sedentary habits may decrease it. Gravidity and physical activity showed no significant association in this study.
Area of Science:
- Gastroenterology
- Epidemiology
- Preventive Medicine
Background:
- Commonly assumed risk factors for hemorrhoids include constipation, low fiber diet, sedentary lifestyle, and gravidity.
- Limited evidence currently exists to support these assumed associations.
Purpose of the Study:
- To investigate the association between commonly cited risk factors and the prevalence of hemorrhoids.
- To provide evidence-based insights into hemorrhoid etiology.
Main Methods:
- A cross-sectional study was conducted on 2,813 participants undergoing colonoscopy.
- Data on bowel habits, diet, and physical activity were collected, and hemorrhoid presence was extracted from colonoscopy reports.
- Logistic regression analysis was used to adjust for age and sex, calculating odds ratios (OR) and 95% confidence intervals (CI).
Main Results:
- Constipation was significantly associated with an increased prevalence of hemorrhoids (OR 1.43, 95% CI 1.11-1.86).
- High grain fiber intake was linked to a reduced risk (OR for quartile 4 vs. 1 = 0.78, 95% CI 0.62-0.98).
- Sedentary behavior showed a reduced risk (OR 0.80, 95% CI 0.65-0.98), while gravidity, physical activity, and overweight/obesity status did not show significant associations.
Conclusions:
- Constipation is a significant risk factor for hemorrhoid development.
- High grain fiber intake and sedentary behavior are associated with a decreased risk of hemorrhoids.
- Gravidity and general physical activity levels do not appear to be associated with hemorrhoid prevalence.
Background:
Constipation, a low fiber diet, sedentary lifestyle and gravidity are commonly assumed to increase the risk of hemorrhoids. However, evidence regarding these factors is limited. We examined the association between commonly cited risk factors and the prevalence of hemorrhoids.
Methods:
We performed a cross sectional study of participants who underwent a colonoscopy in a colorectal adenoma prevention trial and who had a detailed assessment of bowel habits, diet and activity. The presence of hemorrhoids was extracted from the subjects' colonoscopy reports. We used logistic regression to estimate odds ratios and 95% confidence intervals while adjusting for age and sex.
Results:
The study included 2,813 participants. Of these, 1,074 had hemorrhoids recorded. Constipation was associated with an increased prevalence of hemorrhoids (OR 1.43, 95% CI 1.11, 1.86). Of the fiber subtypes, high grain fiber intake was associated with a reduced risk (OR for quartile 4 versus quartile 1 = 0.78, 95% CI 0.62, 0.98). We found no association when comparing gravid and nulligravida women (OR 0.93, 95% CI 0.62-1.40). Sedentary behavior was associated with a reduced risk (OR 0.80, 95% CI 0.65-0.98), but not physical activity (OR 0.83, 95% CI 0.66-1.03). Neither being overweight nor obese was associated with the presence of hemorrhoids (OR 0.89, 95% CI 0.72-1.09 and OR 0.86, 95% CI 0.70-1.06).
Conclusions:
Constipation is associated with an increased risk of hemorrhoids. Gravidity and physical activity do not appear to be associated. High grain fiber intake and sedentary behavior are associated with a decreased risk of hemorrhoids.
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