[Work Participation after Multimodal Rehabilitation due to Diseases of the Digestive System. Representative Analyses using Routine Data of the German Pension Insurance].

Purpose: Diseases of the digestive system such as Crohn's disease (CD) or ulcerative colitis (UC) are associated with problems in occupational participation, but they only make up a very small part of all rehabilitation services provided by the German Pension Insurance. Rehabilitation is a very good treatment option, but its effectiveness is largely unclear. So far, several studies exist on the return to work after medical rehabilitation. However, representative findings and the relevant influencing factors are still lacking. This is the aim of the present analysis.

Methods: We used the rehabilitation statistics database of the German Pension Insurance. Patients were included with completed medical rehabilitation due to a disease of the digestive system in 2017. The analyses were carried out for the entire group as well as differentiated according to the diagnosis groups CD, UC, diverticular diseases (DI) as well as pancreatic diseases (PA). Occupational participation was operationalised both via a monthly information up to 24 months after rehabilitation and as a rate of all persons who were employed after 12 or 24 months in the survey month and the 3 preceding months. For the analysis of the influencing factors on stable occupational participation, multiple logistic regression models with stepwise inclusion were calculated separately for the rates after 12 and 24 months.

Results: A total of 8,795 data sets were included in the analysis (CD: n=1,779, 20%; UC: n=1,438, 16%; DI: 1,282, 15%; PA: n=761, 9%). The average age in the groups ranged from 44 (CD) to 54 (DI) years; the proportion of women ranged from 28% (PA) to 57% (CD). Between 16% (DI) and 32% (PA) of the rehabilitation participants had sickness absences of 6 or more months in the year before rehabilitation. Two years after rehabilitation, the return-to-work rates were 69% (CD), 71% (UC), 68% (DI) and 58% (PA). The strongest influencing factors on stable occupational participation were time of sick leave and wage before rehabilitations well as work ability at admission.

Conclusion: Two years after gastroenterological rehabilitation in Germany, 6 to 7 out of 10 affected persons return to stable work participation. Relevant influencing factors are the time of sick leave and the level of remuneration. The results support an expansion of rehabilitation concept to include work-related aspects.