Table 2 Dataset columns (features)

Age

Shimmer (dB)

Sex

Shimmer: 3-point Amplitude Perturbation Quotient (APQ3)

Motor UPDRS

Shimmer: 5-point Amplitude Perturbation Quotient (APQ5)

Total UPDRS

Shimmer: 11-point Amplitude Perturbation Quotient (APQ11)

Jitter (%)

Shimmer: Average Absolute Differences (DDA)

Jitter absolute (Abs) in ms

Noise-to-Harmonics Ratio (NHR)

Jitter: Average Relative Perturbation (RAP)

Harmonics-to-Noise Ratio (HNR)

Jitter: 5-point Period Perturbation Quotient (PPQ5)

Recurrence Period Density Entropy Measure (RPDE)

Jitter: Difference of Differences of Periods (DDP)

Signal fractal scaling exponent of Detrended Fluctuation Analysis (DFA)

Shimmer

Pitch Period Entropy (PPE)