Fig. 3.

Receiver Operating Characteristic Curves of Total Count of Claims-Based Frailty Surrogates (Count Approach) versus a Claims-Based Frailty Index Model (Model-Based Approach) in Identifying the Frailty Phenotype. Abbreviations: CI, confidence interval; sens, sensitivity; spec, specificity. Legend: The count approach demonstrated a lower C-statistic than the model-based approach in identifying the frailty phenotype. The optimal cutpoint of the count approach was ≥1, which achieved a sensitivity of 0.62 and a specificity of 0.67. The optimal cutpoint of model-based approach was ≥0.17, which achieved a sensitivity of 0.66 and a specificity of 0.72