This cross-sectional study compares trends in mortality by age for intracerebral and subarachnoid hemorrhage. United States mortality data from the Centers for Disease Control from the years 1991 to 1992 are examined with the program CDC Wonder, and mortality rates for 10-year age groups for each disease are compared. As expected, the crude mortality rate attributable to intracerebral hemorrhage, at 7.1 per 100,000, is much greater than that of subarachnoid hemorrhage, at 2.7 per 100,000. However, the age distribution of this mortality is found to be very different in the two conditions (chi(2), P<.0001), with a younger population affected by subarachnoid hemorrhage. This difference is even more pronounced in earlier United States mortality data from 1979 to 1980. This has important implications for epidemiological studies of hemorrhagic stroke as a whole.
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