Prevalence of parkinsonism and Parkinson disease in urban and rural populations from Latin America: A community based study.

Lancet Reg Health Am · 2022 · PMC8920908 · PMID 35300390

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may be significantno p-value reported

Therefore, the potential error in any single study may be significant, especially in older population age groups where slowness and tremor may be misdiagnosed as one of several other common disorders affecting this age group (for example, arthritis, stroke, dementia).

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a clear trendno p-value reported

There was a clear trend in all sites for parkinsonism's prevalence to increase with age (for both men and women), ranging from 2.8% (95% CI, 2.3–3.4) in the 65–69 age group to 16.5 (95% CI, 15.1–17.9) in the 80 plus age group ( p < 0.001).

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.