Dietary fibre intakes and reduction in functional constipation rates among Canadian adults: a
cost-of-illness analysis
Sammanfattning
Background: Evidence-based research highlights beneficial impacts of dietary fibre on several
aspects of the gut pathophysiology that are accompanied by a considerable financial burden in
healthcare services. Recommended intakes of dietary fibre may thus associate with financial
benefits at a population level.
Objective: We sought to systematically assess the potential annual savings in healthcare costs that
would follow the reduction in rates of functional constipation and irregularity with increased dietary
fibre intakes among Canadian adults.
Design: A cost-of-illness analysis was developed on the basis of current and recommended levels of
fibre intake in Canada, constipation reduction per 1 g fibre intake, proportion of adults who are likely
to consume fibre-rich diets, and population expected to respond to fibre intake. Sensitivity analyses
covering a range of assumptions were further implemented within the economic simulation.
Results: Our literature searches assumed a 1.8% reduction in constipation rates with each 1 g/day
increase in fibre intake. With intakes corresponding to the Institute of Medicine’s adequate levels of
38 g/day for men and 25 g/day for women, among 5 and 100% of the adult populations, anywhere
between CAD$1.5 and CAD$31.9 million could be saved on constipation-related healthcare costs
annually. Each 1 g/day increase in dietary fibre was estimated to result in total annual healthcare
cost savings that ranged between CAD$0.1 and CAD$2.5 million.
Conclusions: The present research suggests an economic value of increasing dietary fibre intake
beyond its well-known health benefits. Healthy-eating behaviours consistent with the recommended
intakes of dietary fibre by the general public should hence be advocated as a practical approach for
reducing costs associated with the management of constipation in Canada.