Responsiveness and Minimal Clinically Important Difference (MCID) of Knee Injury and Osteoarthritis (KOOS-12) in (OA)

60 participants undergoing PT-intervention for about 3 months will be taken and questionnaire (KOOS-12) will be filled by them at regular intervals of baseline, 4, 8 and 12 weeks respectively while global rating of change questionnaire will be filled by them at start and end of intervention and these values will be compared to see if patients' condition has improved or not.