BDI Baduanjin Explainable Artificial Intelligence FRAIL scale Parkinson’s disease dementia Parkinson’s disease with mild cognitive impairment Public health & preventive medicine STAI SUNFRAIL SWLS Self-Rating Anxiety Scale Tilburg Frailty Indicator accidental falls aged aging artificial intelligence brain stimulation clinical dementia rating cognitive function color-changing chewing gum community-based community-dwelling older adults convergence rate cross-sectional study data mining dementia depressive symptoms determinants driving cessation elderly patients