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Figure 1 | Health and Quality of Life Outcomes

Figure 1

From: Mapping the EQ-5D index by UPDRS and PDQ-8 in patients with Parkinson’s disease

Figure 1

Presentation of the EQ-5D data fit for the regression line (left panel: EQ-5D German index ; right panel: EQ-5D European index ): comparison of the fitted values estimated by alternative analytic approaches (dots: EQ-5D values; solid line: fitted regression line by ordinary linear regression; dash-dot line: fitted regression line by a generalised additive model; dashed line: fitted regression line by fractional polynomials). The UPDRS II was not presented because its categorical nature led to the accumulation of points by a small number of values.

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