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Plots of predicted PDQ‐8 against PFS‐16. Values based on models depicted in Table 1: (A) interaction between age and PFS‐16 and (B) interaction between GDS‐15 and PFS‐16. CI, confidence interval; GDS‐15, Geriatric Depression Scale–15 item; PDQ‐8, Parkinson's Disease Quality of Life–8 item; PFS‐16, Parkinson Fatigue Scale–16 item.
