SLC6A3 and hypertensive disorder: Propensity score subsamples (109 in the PD‐WMH + group and 109 matched samples in the PD‐WMH– group) revealed no significant differences in baseline demographic characteristics and striatal DAT availability between the PD groups, although the PD‐WMH + group tended to have higher UPDRS‐III scores (P = 0.098) and a higher prevalence of hypertension (P = 0.078) than the matched PD‐WMH– group.