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Science
19 March 2025

New Study Links Waist Circumference To Mortality In Parkinson's Disease

Research uncovers impact of central obesity on survival rates in patients with PD over a decade-long study.

The relationship between waist circumference and mortality risk in patients with Parkinson's disease has come into focus in a recent study conducted in South Korea. This extensive research, published in Scientific Reports, analyzed data from over 22,000 patients and uncovered alarming associations that could inform clinical practices focused on patient care.

Parksinson's disease (PD) is the second most common neurodegenerative disorder, characterized by progressive motor dysfunction and a host of associated non-motor symptoms. The study aimed to understand the impact of waist circumference (WC)—a crucial indicator of central obesity—on long-term mortality outcomes for patients diagnosed with PD between 2008 and 2017. Experts are increasingly recognizing the interplay between metabolic parameters and neurodegenerative diseases, presenting central obesity as a potential risk factor for more severe disease progression.

Interestingly, the study found that waist circumferences below 70 cm in men and 65 cm in women significantly correlated with an increased risk of death among PD patients, presenting a hazard ratio (HR) of 1.19. In contrast, higher waist measurements—≥90 cm for males and ≥85 cm for females—also posed a significant threat, with mortality risk escalating further in patients categorized with central obesity (HR 1.50 for men with a WC ≥ 100 cm).

This study revealed a J-shaped pattern among males and a U-shaped pattern in females, suggesting that both low and high waist circumferences have detrimental effects on longevity in patients with Parkinson's disease. "Central obesity is a significant risk factor for mortality in patients with PD after adjusting for BMI," stated the authors of the article.

The analysis used data from the Korean National Health Insurance Service, reflecting a substantial portion of the Korean population, adding depth to the findings. The research highlights a crucial relationship between body composition and neurodegeneration, underlining that waist circumference should be closely monitored in these patients. Analysis showed that of 22,118 PD patients included in the study, 9,179 succumbed to the condition during the following ten years.

The investigation further noted the impact of body mass index (BMI) in adjusting mortality risk correlations, indicating that while lower BMI is traditionally thought to be a concern, obesity may offer some protective factors against PD-related mortality. Specifically, this interrelationship underlines the need for tailored management strategies addressing both waist circumference and BMI to improve patient outcomes.

Parkinson's disease has seen a surge in prevalence rates, exacerbated by an aging global population that grapples with chronic illness and metabolic syndrome. As evidence mounts regarding how metabolic health intertwines with neurodegenerative health, investigations like this one are pivotal for advancing understanding and treatment approaches.

The study served to fill a gap in research regarding the association of waist circumference and mortality risk in PD, an area previously underexplored. The compelling evidence emphasizes the risks associated with maintaining a healthier waist circumference, guiding future healthcare pathways aimed at reducing the overall mortality rate in patients.

In conclusion, the study fosters a deeper understanding of waist circumference's role in mortality within the context of Parkinson's disease. By highlighting the necessity of waist management, it proposes a new paradigm for patient care that bears implications not just for individual patients but also for public health strategies addressing neurodegenerative diseases at large. Further research is essential to continue exploring the intersection of metabolic health and chronic neurological conditions as the field seeks effective interventions and management strategies to improve the quality of life for patients affected by this debilitating disease.