Self-assessment of faecal pH and bulk in cancer studies
Author Information
Author(s): A. van Faassen, P. van't Veer, R.A. Bausch-Goldbohm, F. Sturmans, R.J.J. Hermus
Primary Institution: TNO Nutrition and Toxicology Institute
Hypothesis
Self-assessment of faecal pH and bulk can accurately reflect dietary fibre intake and its association with colorectal cancer risk.
Conclusion
Self-assessment of faecal pH and bulk is feasible, but accuracy varies, particularly with learning effects over multiple assessments.
Supporting Evidence
- Faecal pH and bulk self-assessment showed a learning effect over multiple trials.
- Vegetarians had a significantly higher dietary fibre intake than non-vegetarians.
- Self-assessment methods were found to be feasible and reproducible.
Takeaway
This study looked at how well people can check their own stool pH and weight to help understand their risk of colon cancer. It found that while people can do this, they get better at it the more they try.
Methodology
Participants self-assessed their faecal pH and bulk over four days, with measurements taken in a lab for accuracy.
Potential Biases
Potential misclassification bias due to inaccuracies in self-assessment.
Limitations
The study's reliance on self-assessment may introduce inaccuracies, and the sample size for some measurements was small.
Participant Demographics
Participants included vegetarians and non-vegetarians aged 55-69 years from various municipalities in the Netherlands.
Statistical Information
Statistical Significance
p<0.05
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