[Systematic literature analysis on therapies applied in rehabilitation of hip and knee arthroplasty: methods, results and challenges].

Evidence-based medicine is a central issue in medical practice. This also applies to rehabilitation services. The German Statutory Pension Insurance meets this need in its guideline programme. Amongst others a guideline for rehabilitation following hip or knee arthroplasty is currently being developed. In this context a hierarchic, systematic literature analysis was conducted summarising the current state of evidence with reference to the effects and the treatment requirements (frequency and duration) of different rehabilitative therapies following total hip or knee replacement. In the first step, a search for evidence-based guidelines, systematic reviews and health technology assessments was conducted. Secondly, search strategies for primary literature in the following databases were designed: Cochrane Central Register of Controlled Trials, MEDLINE, EMBASE, and PsychINFO (01/1997-09/2007). Additionally, a handsearch of several German journals not listed in the databases was conducted. Randomized trials were preferred, however, non-randomized trials were included if the intervention and control groups were comparable with regard to the baseline parameters. Results can be classified into three categories: (1) therapies for which evidence for (positive) effects was found, (2) therapies for which evidence was found, however, their transferability onto rehabilitation in Germany should be discussed (e. g., studies on immediate post-surgery interventions), and (3) therapies for which no methodologically appropriate trials could be found. The literature reviewed does not allow for final conclusions as to frequency and duration of different therapeutic interventions within the rehabilitation time frame in Germany (usually the first three weeks post discharge from hospital). Overall, there is a need for further research.