1. Pain trajectory groups in persons with, or at high risk of, knee osteoarthritis: findings from the Knee Clinical Assessment Study and the Osteoarthritis Initiative 
E. Nicholls, E. Thomas, D.A. van der Windt, P.R. Croft, G. Peat 
Osteoarthritis and Cartilage 
Volume 22, Issue 12, Pages (December 2014)
DOI: /j.joca
Copyright © 2014 The Authors Terms and Conditions

2. Fig. 1
WOMAC Pain Scores by Trajectory Group Membership for (A) CAS-K and (B) Matched OAI Sample (N = 570). Abbreviations: PYRC = Per-year rate of change in WOMAC points; 95% confidence interval in brackets.
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
Copyright © 2014 The Authors Terms and Conditions