Statistical analysis
PD, gait impairments
A sample size of at least 13 patients per group was required (calculated by PASS v15 software, factorial analysis of variance using effect size, minimum power: 0.8, type I error: 0.05, numbers of factors: 2, and effect size: 0.4).All data were analyzed using SPSS v25.0 software (IBM) and Shapiro–Wilks test was performed to assessed for normality. For baseline demographic and clinical characteristics, Later, to evaluate the severity of gait impairments in PD patients, two‐sample Finally, to determine the effect of group and stimulation conditions on gait parameters, motor symptoms, and ΔHbO