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. Author manuscript; available in PMC: 2022 Jun 1.
Published in final edited form as: Int J Geriatr Psychiatry. 2021 Feb 2;36(6):909–916. doi: 10.1002/gps.5492

Figure 2: Baseline PPT as a non-linear correlate of ADL function.

Figure 2:

ADL function (UPDRS part II; higher is worse) as a function of PPT score at baseline (left panel) or the final evaluation (right panel) (n=399). Analysis of variance supported the superiority of the quadratic function (red dashed lines) over the linear function (black lines) at baseline (df=1, F=23.2, p<0.0001), but not at the final visit (df=1, F=0.01, p=0.91). Adjusted R2 values were 0.153 and 0.106 for the quadratic and linear models at baseline, respectively.