Non-motor symptoms and quality of life in patients with Parkinson's disease in Northeastern Mexico.

Parkinson's disease (PD) is a multisystem disorder, and besides the classical motor symptoms it is now known that patients also suffer from a variety of non-motor symptoms that adversely affect quality of life (QOL). Since data on Hispanic populations on this issue are scarce, our aim was to study the association of non-motor symptoms and QOL in patients with PD. This study is a cross-sectional observational study involving patients with PD using the following instruments: Quality of Life Questionnaire (PDQ-8), Unified Parkinson's Disease Rating Scale part III (UPDRS part III), and Non-Motor Symptom Scale (NMSS). We included 52 patients, with a median age of 64 years. Sleep/fatigue and mood/cognitive domains were the most common non-motor symptoms. Only sleep/fatigue, mood/cognition and gastrointestinal domains were associated with worse PDQ-8 scores. After adjusting for confounding variables, NMSS scores were significantly associated with a high PDQ-8 score. Higher NMSS scores were associated with and predicted higher PDQ-8 scores. The focus of management in PD should shift to a comprehensive strategy that incorporates care of non-motor symptoms and improves QOL.