1. Natural history of cartilage damage and osteoarthritis progression on magnetic resonance imaging in a population-based cohort with knee pain 
J. Cibere, E.C. Sayre, A. Guermazi, S. Nicolaou, J.A. Kopec, J.M. Esdaile, A. Thorne, J. Singer, H. Wong 
Osteoarthritis and Cartilage 
Volume 19, Issue 6, Pages (June 2011)
DOI: /j.joca
Copyright © 2011 Osteoarthritis Research Society International Terms and Conditions

2. Fig. 1 Flow diagram of study enrollment for 3-year follow-up.
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
Copyright © 2011 Osteoarthritis Research Society International Terms and Conditions

3. Fig. 2
Knee OA progression rate from baseline to 3-year follow-up – overall and by KL grade severity. OA progression on MRI was defined as cartilage loss of ≥2 grades in at least one joint site or cartilage loss of ≥1 grade in at least two joint sites (see methodology).
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
Copyright © 2011 Osteoarthritis Research Society International Terms and Conditions