Journal
BMC GERIATRICS
Volume 19, Issue -, Pages -Publisher
BMC
DOI: 10.1186/s12877-019-1050-1
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Funding
- Swedish Research Council for Health, Working Life and Welfare (FORTE) [2016-07115]
- Forte [2016-07115] Funding Source: Forte
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BackgroundStroke incidence has declined during the past decades. Yet, there is a concern that an ageing population together with improved survival after stroke will result in a raised proportion of the population who have experienced a stroke, as well as increasing incidence rate of recurrent strokes, and, absolute numbers of strokes. The objectives of this study were to investigate how the age specific incidence rates of recurrent strokes have developed in relation to the incidence rates of first strokes and how the postponement in age look like, and to see how the prevalence proportion of stroke as well as the absolute number of incident strokes has changed over time.MethodsThis study includes the total Swedish population born 1890-1954 living in Sweden from 1987. Stroke was identified through hospital admissions and deaths in national health registers (mandatory for all hospitals in Sweden). Age specific incidence rates were calculated for first, second, all recurrent, and all strokes for each calendar year between 1994 and 2014 for each age between 60 and 104years. The proportion in the population with a history of stroke up to 7years back in time was also calculated for different age groups and for different calendar years.ResultsNot only the incidence rate of first stroke but also of recurrent strokes have declined. The declines are evident in all ages up to 90years of age, but not in ages above 90years. Despite improved survival in stroke, the prevalence proportion has declined over the period and was around 3% in 2014 (somewhat higher for men than women). Even incident cases of stroke in absolute number has declined.ConclusionsDecreasing incidence rates of stroke have offset an increase in both absolute and relative numbers of stroke that otherwise would have taken place due to improved survival and an ageing population. The decline in stroke recurrence has been as strong as the decline in first strokes.
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