Fig. 1

Flow chart of participants and follow-ups with physical performance tests and the Knee Self-Efficacy Scale (K-SES). †Long-distance relocation or transferal to a physical therapist (PT) not involved in the study. ††Pregnancy (n = 1), disc herniation (n = 1), advised against performing test by PT (n = 3), missing test protocols (n = 3). Participants with K-SES data and physical performance test data were included in the analyses