ArticleClinics (Sao Paulo, Brazil)2024
Seasonality as a risk factor for deaths in Parkinson's disease.
Article in Clinics (Sao Paulo, Brazil), 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- A whole-transcriptome analysis of differentially expressed genes, transcripts, and transcript usage in blood samples from Parkinson's disease patients.Experimental biology and medicine (Maywood, N.J.) · 2026Article
- Sleep Duration, Chronotype, and Mortality in Parkinson's Disease: A Prospective Cohort Study.Nature and science of sleep · 2026Article
- Far from being the end of the road: taking a closer look at neuropalliative care in Parkinson's disease.Journal of neural transmission (Vienna, Austria : 1996) · 2025Review
- Epidemiology of autonomic dysfunction in Parkinson's disease (Review).Medicine internationalReview
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundAccording to growing evidence, sleep disruption harms biological processes and circadian homeostasis. Diurnal motor symptom volatility in Parkinson's Disease (PD) has been extensively studied. Few studies examined seasonal variability in PD symptoms, some showing it and others not.
objectiveTo investigate whether PD patients' deaths follow a rhythmic pattern due to circadian rhythm alterations.
methodsThis study used only unidentified patient databases. People with PD, ICD10 code G20, in at least one death certificate field were selected. The Continuous Wavelet Transform and Fourier Transform were checked for oscillation and its duration.
resultsThe 18-year analysis found 43,072 PD deaths. The Continuous Wavelet transform revealed a 351.87-day annual component (p < 0.05). Winter in the southern hemisphere saw more deaths, mainly in July. The Continuous Wavelet transform identified a significant daily component (p < 0.05) of 22.81 hours. Fatalities peaked around 9 a.m. Pneumonia is the leading cause of death in PD, and women and men have the same rhythm pattern.
conclusionParkinson's disease mortality in Brazil follows a pattern. Using over 40.000 death certificates from 18 years, the authors found that Parkinson's patient fatalities rise in winter and peak in July at about 9 a.m. Sunlight reduction increases mortality risk in the long term. Low sunshine lowers temperatures, increasing short-term death risk. This is crucial because it prioritizes the sun, seasons, and circadian rhythm over low temperatures.
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