Body mass index, sitting time, and risk of Parkinson disease.

Roos, Elin; Grotta, Alessandra; Yang, Fei; Bellocco, Rino; Ye, Weimin; Adami, Hans-Olov; Wirdefeldt, Karin; Trolle Lagerros, Ylva · Neurology · 2018

prospective_cohort · Level II

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Abstract

Causes of Parkinson disease are largely unknown, but recent evidence suggests associations with physical activity and anthropometric measures. We prospectively analyzed a cohort of 41,638 Swedish men and women by detailed assessment of lifestyle factors at baseline in 1997. Complete follow-up until 2010 was achieved through linkage to population-based registers. We used multivariable Cox proportional hazards models to estimate hazard ratios with 95% confidence intervals (CIs). We identified 286 incident cases of Parkinson disease during follow-up. Multivariable adjusted hazard ratios were 1.06 (95% CI 0.76-1.47) for sitting time ≥6 vs <6 hours per day; and 1.13 (95% CI 0.60-2.12) for body mass index ≥30 vs <25 kg/m<sup>2</sup>. Results did not differ by sex. No association between prolonged sitting time per day or obesity and risk of Parkinson disease was found.

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