“…Following the RCT, a subsequent analysis with a person-based approach was performed, grouping participants using a cluster analysis [13] based on a selection of empirically supported and clinically relevant variables associated with general health perception. The variables were DAS 28 [17], pain (visual analog scale -VAS, 0-100) [19], muscle function of lower extremities (timed stands test -TST) [20,21], activity limitation (Health Assessment Questionnaire -HAQ, 0-3) [22,23] and physical activity behavior (self-reported amount of physical activity per week spent on low-, moderate-and high-intensity activity) [11].…”