Modification and validation of the Lysholm Knee Scale to assess articular cartilage damage  H.J. Smith, Ph.D., J.B. Richardson, M.D., A. Tennant, Ph.D.  Osteoarthritis and Cartilage  Volume 17, Issue 1, Pages 53-58 (January 2009) DOI: 10.1016/j.joca.2008.05.002 Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions

Fig. 1 (a) Category probability curves for the squatting item showing disordered thresholds. (b) Category probability curves for the squatting item showing ordered thresholds after collapsing categories 1 and 2. Osteoarthritis and Cartilage 2009 17, 53-58DOI: (10.1016/j.joca.2008.05.002) Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions

Fig. 2 Person–item distribution graph for the 7-item Lysholm Knee Scale. Osteoarthritis and Cartilage 2009 17, 53-58DOI: (10.1016/j.joca.2008.05.002) Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions

Fig. 3 The Bland–Altman plot showing an even distribution of scores around the mean difference. Osteoarthritis and Cartilage 2009 17, 53-58DOI: (10.1016/j.joca.2008.05.002) Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions