Racial and Ethnic Differences in Health-Related Quality of Life for Individuals with Parkinson Disease Across Centers of Excellence.

There were differences in PD outcomes across racial and ethnic groups, even after adjustment for sex, disease duration, HY stage, age and some comorbid conditions. Most notably, there was worse HRQoL among non-Whites when compared to White patients, which was partially explained by cognitive scores. The underlying reason for these differences needs to be a focus of future research.