Has there been a decline in subarachnoid hemorrhage mortality?

T. J. Ingall, J. P. Whisnant, D. O. Wiebers, W. M. O'Fallon

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Abstract

We studied subarachnoid hemorrhage in the population of Rochester, Minnesota, for the 40-year period from 1945 through 1984. The average annual incidence rate of subarachnoid hemorrhage in Rochester has remained constant at approximately 11 per 100,000 population. Age-specific incidence rates increased with age. However, the average annual mortality rate for subarachnoid hemorrhage in Rochester has shown a decreasing trend, from 6.8 per 100,000 population in 1955-1965 to 4.3 in 1975-1984. It is likely that this is due to a decrease in case-fatality rates from 57% in 1945-1974 to 42% in 1975-1984 (p = 0.10). This decreasing trend was also evident in annual mortality rates from subarachnoid hemorrhage for US white men and women. The reason for the improved case-fatality rate is unclear, but it may be related to changes in management. The interval from onset of subarachnoid hemorrhage to surgery decreased from a median of 12 days in 1975-1979 to 2 days in 1980-1984, and of those who survived to receive medical attention, more patients received some form of medical treatment in 1980-1984. Whether either or both of these changes have led to the decrease in the case-fatality rate is uncertain.

Original languageEnglish (US)
Pages (from-to)718-724
Number of pages7
JournalStroke
Volume20
Issue number6
StatePublished - 1989

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ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Neuroscience(all)

Cite this

Ingall, T. J., Whisnant, J. P., Wiebers, D. O., & O'Fallon, W. M. (1989). Has there been a decline in subarachnoid hemorrhage mortality? Stroke, 20(6), 718-724.