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Stroke mortality has been falling rapidly in this country since 1973.To investigate age-race-sex effects on stroke mortality,we studied US vital statistics during 1950-1972 and 1973-1981 in 55-64-,65-74-,and 75-84-year- old race-sex groups.The accelerated rate of decline in stroke mortality since 1973 has had a substantial public health impact,with>200,000 fewer stroke deaths than would otherwise have occurred.For all groups,stroke mortality declined at a greater rate(p<0.05)in 1973-1981 than during 1950- 1972.The rates of decline during 1973-1981 were greater with increasing age(p<0.05)and were more substantial for younger blacks.There was no consistent differences in the rate of decline by sex.The greater rate of decline in absolute stroke mortality in the older age groups and blacks was explained by higher baseline mortality in these groups.Overall,stroke mortality decreased by approximately 2%/yr in 1950-1972 and by approximately 7%/yr after 1973.Rank order of average annual percent decline after 1973 by age-race-sex groups did not correspond to rates of change in treatment or control of hypertension obtained from three national surveys.The accelerated rate of decline after 1973 may have resulted from improved antihypertensive therapy,but our findings fail to confirm this hypothesis and suggest that treatment of hypertension may not be the principal reason for the decline in stroke mortality. |
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cerebrovascular accident
cerebrovascular accident,complications with
cerebrovascular accident,incidence of
cerebrovascular accident,prognosis in
hypertension
mortality
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