New Study Identifies Risk Factors for Parkinson’s Disease-Related Mortality

Overview of Parkinson’s Disease

Researchers in the Netherlands have uncovered risk factors linked to higher mortality associated with Parkinson’s disease (PD) in a recent study published in the Journal of Parkinson’s Disease. PD is one of the most prevalent neurodegenerative disorders, characterized by symptoms such as slow movement, muscle weakness, rigidity, and tremors. Patients with Parkinson’s disease face approximately 1.5 times the overall mortality risk compared to the general population. However, the specific contributors to Parkinson’s disease-related mortality have remained largely undefined.

Study Methodology

To address this gap in understanding, researchers conducted a longitudinal study evaluating mortality in newly diagnosed Parkinson’s patients. The participants were followed for a minimum of thirteen years or until death, with a total of 129 patients included in the analysis. The average follow-up period was ten years, and most participants were already receiving levodopa, a standard treatment for Parkinson’s disease.

Key Findings

The study revealed several independent factors associated with an increased risk of mortality related to Parkinson’s disease. These factors include an early onset of Parkinson’s, higher usage of levodopa, and mild cognitive impairment at diagnosis. Interestingly, factors such as male gender and the severity of parkinsonian impairment did not show a significant link to increased mortality.

Implications of Levodopa Use

While the researchers identified the use of levodopa as a risk factor for increased mortality in Parkinson’s patients, they do not consider levodopa itself to be detrimental. They propose that the progressive motor impairments characteristic of Parkinson’s disease necessitate earlier treatment with levodopa, which may correlate with higher mortality rates.

Cautions and Conclusions

The researchers emphasize that their findings, derived from a population-based observational study, should not be generalized to individual cases. They acknowledge the variability among Parkinson’s patients that could influence life expectancy. The study contributes valuable insights into understanding Parkinson’s disease-related mortality, and the researchers suggest that future studies could enhance the ability to estimate and predict risk factors associated with increased mortality in this population.

References

Hoogland, J., Post, B., & Bie, R. M. D. (2019). Overall and Disease Related Mortality in Parkinson’s Disease – a Longitudinal Cohort Study. Journal of Parkinson’s Disease, 9(4), 767–774. doi: 10.3233/jpd-191652

Researchers report new insights into Parkinson’s disease-related mortality. (2019, November 8). Retrieved from https://www.eurekalert.org/pub_releases/2019-11/ip-rrn110819.php.

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