Table 4.

Correlation study of EMG features and clinical features

Clinical variables	Scale range	Total CI	Total MI-TA muscle
UPDRS postural stability (Item 3.12)	0–2	+ 0.620 (0.054)	+ 0.677(0.023)
UPDRS rigidity (Item 3.3)	0–5	+ 0.674 (0.011)	+ 0.810 (0.033)
UPDRS gait (Item 3.10)	0–3	+ 0.759 (0.002)	+ 0.820 (0.002)
UPDRS body bradykinesia (Item 3.14)	0–3	+ 0.778 (0.006)	+ 0.625(0.015)
UPDRS PIGD	0–20	+ 0.858 (0.018)	+ 0.788(0.012)
Year of disease	1–10	+ 0.554 (0.003)	+ 0.687 (0.07)
H & Y scale	1–3	+ 0.347 (0.241)	+ 0.578 (0.061)
UPDRS III	9–41	+ 0.388 (0.157)	+ 0.738 (0.017)

The ρ (p-value)—Spearman correlation coefficients (ρ) is indicated with level of significance (p). The acronyms used in the table—UPDRS III—Unified Parkinson’s Disease Rating Scale, UPDRS PIGD—UPDRS III Postural Instability and Gait Disturbance, H & Y Scale—Hoehn and Yahr scale