Covariates
trauma
Sociodemographic data included sex (male/female), age (in years), living in a partnership or being married (no/yes), employment status (employed/ unemployed/ other, e.g., pupil, student, or retiree) and level of school education (low/ medium/ high). The hospital department to which the patients were admitted (internal medicine, surgical medicine, trauma surgery, ear-nose-throat) was recorded. Self-rated health was assessed using a single item “Would you say your health in general is excellent, very good, good, fair, poor?” [