The influence of inflammatory bowel disease (IBD) on work loss, or the costs related to work loss, has not been assessed.
In this study, researchers from Canada report IBD-related employment effects, based on the 1998 sample of the Canadian National Population Health Survey (NPHS).
The team's predictive analysis adapts the theory of labor supply to a health context.
|29% of IBD patients reported labor force nonparticipation.|
|American Journal of Gastroenterology|
They included survey respondents, between the ages of 20 and 64 years, who had been diagnosed with Crohn’s disease or colitis.
They estimated odds ratios for labor force nonparticipation using a logistic regression model.
For subjects in the labor force, a Cox proportional hazard model determined whether IBD had an effect on months of continuous employment.
The team found that of the IBD patients 29% reported labor force nonparticipation. This was a greater proportion than non-IBD respondents, who reported 19% nonparticipation.
They determined that the odds ratio for nonparticipation of IBD patients was 1.20, compared with non-IBD patients, when controlling for confounding factors.
The researchers estimated that excess nonparticipation attributable to IBD and similar bowel disorders in Canada to be 3%.
Based on this figure, the team calculated the indirect cost of nonparticipation attributable to IBD in 1998 was more than $104.2 million Canadian dollars.
However, IBD and similar bowel disorders were not significantly related to the number of months worked until a break in employment was reported.
There was no excess work loss among those who were employed that was associated with IBD.
Dr Teresa Longobardi's team concluded, "By using directly observed data in our analysis, this method…can predict the overall burden of IBD and similar bowel disorders".