Study population
Of 151 participants, 5 underwent total knee or total hip replacement during the 3-year follow-up. These 5 participants were excluded, leaving 146 participants for analysis. The 146 participants did not differ in age, sex, body mass index, K & L grade, pain, and WOMAC-pf compared with the total CHECK population. To be included in the analysis, participants had to have complete data at t0 and t1.