Participants
primary hip or knee OA
A total of 764 patients with primary hip or knee OA agreed to participate (Fig. 
Flowchart of the progress of participation in the study. PT = physiotherapist, QPP = Quality from the Patients’ Perspective, MT = medical-technical competence, IO = Identity-Oriented approach
Demographic characteristics of the respondents of the QPP questionnaire at baselineQPP = Quality from Patients’ Perspective; SD = Standard deviation. Allvariables are presented as counts (n) and frequencies (%) or mean and SDStatistically significant differences between groups were analyzed with the Mann-Whitney U test. The statistically significant level was set to < 0.05. No difference in demographic characteristics were found between groups