a clear trendgold
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).