What is a good patient reported outcome after total hip replacement? N.K. Arden, A. Kiran, A. Judge, L.C. Biant, M.K. Javaid, D.W. Murray, A.J. Carr, C. Cooper, R.E. Field  Osteoarthritis and Cartilage  Volume 19, Issue 2, Pages 155-162 (February 2011) DOI: 10.1016/j.joca.2010.10.004 Copyright © 2010 Terms and Conditions

Fig. 1 Venn diagram showing the number of participants involved in the study (799 subjects recruited at baseline). Osteoarthritis and Cartilage 2011 19, 155-162DOI: (10.1016/j.joca.2010.10.004) Copyright © 2010 Terms and Conditions

Fig. 2 ROC and 75th centile plots for satisfaction at 24 months. The 75th centile method cuts the ranked data such that positive responses are contained within 75% of the data. In our analysis, as ‘0’ represents a poor result and ‘48’ represents a good result, the 75th percentile has been taken from the top end of the OHS, i.e., the cut point is at 25%. The work of other authors may have their scoring system in reverse, where ‘48’ is a poor result and ‘0’ is a good result, in which case their cut point is at 75%. Osteoarthritis and Cartilage 2011 19, 155-162DOI: (10.1016/j.joca.2010.10.004) Copyright © 2010 Terms and Conditions

Fig. 3 ROC analysis: OHS based cut points using satisfaction as a binary classifier with 95% CI, stratified by baseline clinical variables. Osteoarthritis and Cartilage 2011 19, 155-162DOI: (10.1016/j.joca.2010.10.004) Copyright © 2010 Terms and Conditions