To the Editor.
—In a recent issue of the Archives, Lilienfeld and colleagues1 reported notable changes in age-specific mortality for Parkinson's disease (PD) during two decades (1962 through 1982) in the United States. The authors observed a decline in PD mortality rates among the middle aged and an increase in rates in the geriatric age group, both in whites and nonwhites and in both sexes. They concluded that these temporal changes, although possibly due to better case ascertainment and improved treatment of PD, may reflect a true rise in the incidence among the elderly, with some implication for the pathogenesis of the disease. Similar findings have been reported, but not discussed, by Li and colleagues2 in England and Wales.We have analyzed the mortality rates for PD in Italy in the period from 1957 through 1981 (International Classification of Diseases code 350.0 for the period from 1957 through
Chió A, Magnani C, Tolardo G, Schiffer D. Trends in Parkinson's Disease Mortality in Italy. Arch Neurol. 1991;48(10):1010–1011. doi:10.1001/archneur.1991.00530220026011
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