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Fig. 4 | Health and Quality of Life Outcomes

Fig. 4

From: Clinimetric properties of the ASAS health index in a cohort of Italian patients with axial spondyloarthritis

Fig. 4

The ROC curves to discriminate the ability of ASAS HI to distinguish patients with active and inactive disease in comparison with anthropometric measures and self-report questionnaires, using ASDAS-CRP as external indicator. The area under the ROC curve (AUC) in this setting can be interpreted as the probability of correctly identifying the improved patients from non-improved. A line that runs diagonally across the figure from lower left to upper right will have an area of 0.5; this represents an instrument that does not discriminate

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