Abstract P214: The Incidence of Intracerebral Hemorrhage Increases Among the Elderly
Background Intracerebral hemorrhage (ICH) is feared because of its high case-fatality and poor functional outcomes. The risk of ICH increases dramatically with age. In the present study we determined nationwide age-sex specific ICH incidence from 1997 to 2005.
Methods First hospitalized ICH patient were identified through linkage of the national hospital discharge register and the population register using ICD-9 code 431. Out-of-hospital deaths for ICH were identified in the national cause of death register using ICD-10 code I61. We calculated age standardized and age-sex specific incidence rates for every year. We identified trends in time series using Mann-Kendall tests.
Results Between 1997 and 2005 we identified 29,703 new ICH cases (51% men). Six percent were out-of-hospital deaths. In both men and women the age standardized incidence rates remained stable over time. Incidence rates were 21.7 per 100,000 in 1997 and 22.1 per 100,000 in 2005 in men and 20.7 per 100,000 in 1997 and 20.6 in 2005 in women. Age-sex specific incidence showed a small but significant (p<0.05) decline in men and women aged 65 to 74 years and a large significant (p<0.01) increase in men and women aged 85 to 94 years (figure 1).
Conclusions Age standardized ICH incidence remained stable over time. However, age-sex specific analysis showed that among the elderly (85-94y) incidence is increasing over time. Further investigation of nationwide age-sex specific data on trends in treatment and risk factors is needed to explain these worrying findings.
- © 2013 by American Heart Association, Inc.