This article presents main results of a study comparing outcome and costs of various all-day outpatient and inpatient orthopaedic rehabilitation forms. The results were obtained within the scope of a comprehensive evaluation programme commissioned by the federation of health (VdAK) and pension insurance institutes (VDR). The purpose of this evaluation was to examine the quality of different types of various rehabilitation care. The outcome comparison comprises a longitudinal follow-up of various somatic, psychosocial und occupational reintegration parameters up to one year after rehabilitation as well as outcome assessments from the perspective of patients and physicians in rehabilitation centres and general practice. The costs are estimated on the basis of data from health and pension insurance funds. The results show extensive corresponding of results und assessments in the different forms of rehabilitation care for comparable patient groups. There are no indications of poorer care quality in outpatient rehabilitation, while economic analyses show better cost effectiveness in outpatient treatment by comparability of treatment, patients, and results. Results suggest that outpatient care, offered in the same quality as in the examined rehabilitation centres, is an alternative or complement to inpatient care at least for those patients, who can be treated in both the outpatient and inpatient setting.