>Objective
Validation of the program theory of the Groningen orthopaedic exit strategy (GOES), a theory-driven program aiming to improve the rehabilitation of total hip and knee arthroplasty patients after shortened hospital stay. First part of the program theory is the action theory, hypothesising that the GOES treatment positively influences the mediating variables (self-efficacy, social support, pain-coping). The second part, the conceptual theory, hypothesis a positive relationship between these variables and the outcome variables (ADL functioning, physical activity behaviour, quality of life).
Methods
Patients were randomly assigned to the GOES or control groups. Questionnaires were used to assess mediating and outcome variables in 103 patients (50 GOES, 53 controls) pre-operatively, and 6 and 26 weeks post-operatively.
Results
No difference was seen between the two groups in terms of changes between pre-operative and post-operative mediating variables (action theory). Moderate-to-large correlations explaining reasonable amount of variance (22 % , 25 % , 56 % ) were found between the mediating and outcome variables (conceptual theory).
Conclusion
The conceptual theory is supported; however, as the treatment did not influence the mediating variables (action theory), it has no added value in its current form.
Practice implications
The treatment needs to be adjusted; it is discussed that individualised treatment could be more effective.
