Figure 1.

Evaluating feature selectivity. Linear regression was performed on each feature independently to evaluate feature selectivity for early-stage PD status. F-statistics from feature-wise linear regression were aggregated into a distribution and the threshold for significance was set to p < 0.05 (red line). In fact, 38.6% of all features were significantly associated with early-stage PD status. Variability in feature selectivity was observed across assessments (Table 3).