Fibromyalgia Assessment Status receiver operating characteristic curve. The results of the sensitivity and specificity analyses of various cut-off points for the composite index are summarised. We analysed the ability of Fibromyalgia Assessment Status to identify patient populations: the greater the area under the curve (AUC), or the further the distance to the 'change line', the better its discriminant power. ROC = receiver operating characteristic.
Salaffi et al. Arthritis Research & Therapy 2009 11:R125 doi:10.1186/ar2792