ROC curve analyses of plasma NPY (blue curve) as a predictor of CFS, comparing CFS with GWI. Larger values were associated with CFS cases. The 45 degree line (green) indicates the theoretical plot of a test with no discrimination between CFS and GWI.
Fletcher et al. Behavioral and Brain Functions 2010 6:76 doi:10.1186/1744-9081-6-76