Prevalence of Parkinson Disease in Italy: a systematic review and meta-analysis.

Our study identified a clear trend across age groups, with prevalence rates increasing more than ten times from 37.8/100,000 in subject aged less than 65 years, to 578.7/100,000 in subjects aged 65 to 74 years, eventually doubling in older groups (≥ 75 years).

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When prevalence rates were assessed by age groups, an increasing trend was clearly evident, with a pooled prevalence rate of 37.8/100,000 (95%CI 25.2 to 56.5) in subjects aged 0 to 64 years ( Figure 4 ), that increased to 578.7/100,000 (95%CI 373.5 to 895.5) in the age group 65 to 74 years ( Figure 5 ), and to 1235.7 (806.9 to 1888.1) in age group 75 years or more ( Figure 6 ).

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