Interestingly, this review identified several additional factors that were correlated with higher risk of PD-related cognitive impairment (not yet dementia), including age of onset, genetic risk (Apolipoprotein E [APOE], microtubule associated protein tau [MAPT]), Unified Parkinson’s Disease Rating Scale (UPDRS) III scores, and anxiety. The gene discussed is MAPT; the disease is dementia.