Association of the Naples prognostic score with Parkinson disease risk: a prospective cohort study.

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BackgroundThe Naples prognostic score (NPS), derived from routine inflammatory and nutritional biomarkers, reflects systemic immune-metabolic status. Its prospective association with Parkinson disease (PD) risk has not been well established.MethodsWe analyzed 317,035 UK Biobank participants recruited in 2006-2010 who were free of PD and malignancy at baseline and had complete NPS component data. NPS was derived from serum albumin, total cholesterol, neutrophil-to-lymphocyte ratio, and lymphocyte-to-monocyte ratio. Incident PD through 31 December 2022 was identified using a validated algorithm. Associations were examined using Cox proportional hazards models with multivariable adjustment.ResultsOver a median follow-up of 13.94 years, 2,298 participants (0.72%) developed PD. Higher NPS was significantly associated with increased PD risk. After multivariable adjustment, each 1-point increase in NPS corresponded to a 13% higher risk (Model 2 adjusted HR = 1.13, 95% CI: 1.07-1.19, p p p for trend ConclusionIn this large prospective cohort, higher NPS was independently associated with increased PD risk. These findings support the potential role of integrated inflammatory-nutritional status in PD development and suggest that NPS may serve as a readily available marker for risk stratification.

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