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Original Investigation
May 23, 2019

Association of Stroke Among Adults Aged 18 to 49 Years With Long-term Mortality

Author Affiliations
  • 1Radboud University Medical Centre, Donders Institute for Brain, Cognition, and Behaviour, Department of Neurology, Nijmegen, the Netherlands
  • 2Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, the Netherlands
  • 3Department of Neurology and Neurosurgery, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, the Netherlands
JAMA. 2019;321(21):2113-2123. doi:10.1001/jama.2019.6560
Key Points

Question  In young adults aged 18 to 49 years, what is the age- and sex-specific case fatality and long-term mortality associated with stroke?

Findings  In this Dutch register-based cohort study that included 15 527 patients who in the years 1998-2010 had a first stroke at age 18 to 49 years, cumulative 15-year mortality among 30-day survivors was 13.3 per 1000 person-years compared with an expected mortality of 2.4 per 1000 person-years in the general population, an excess mortality of 10.9 per 1000 person-years.

Meaning  Mortality risk 15 years after stroke among young adults aged 18 to 49 years who were 30-day survivors remained elevated.

Abstract

Importance  Stroke remains the second leading cause of death worldwide. Approximately 10% to 15% of all strokes occur in young adults. Information on prognosis and mortality specifically in young adults is limited.

Objective  To determine short- and long-term mortality risk after stroke in young adults, according to age, sex, and stroke subtype; time trends in mortality; and causes of death.

Design, Setting, and Participants  Registry- and population-based study in the Netherlands of 15 527 patients aged 18 to 49 years with first stroke between 1998 and 2010, and follow-up until January 1, 2017. Patients and outcomes were identified through linkage of the national Hospital Discharge Registry, national Cause of Death Registry, and the Dutch Population Register.

Exposures  First stroke occurring at age 18 to 49 years, documented using International Classification of Diseases, Ninth Revision, and International Statistical Classification of Diseases and Related Health Problems, Tenth Revision, codes for ischemic stroke, intracerebral hemorrhage, and stroke not otherwise specified.

Main Outcomes and Measures  Primary outcome was all-cause cumulative mortality in 30-day survivors at end of follow-up, stratified by age, sex, and stroke subtype, and compared with all-cause cumulative mortality in the general population.

Results  The study population included 15 527 patients with stroke (median age, 44 years [interquartile range, 38-47 years]; 53.3% women). At end of follow-up, a total of 3540 cumulative deaths had occurred, including 1776 deaths within 30 days after stroke and 1764 deaths (23.2%) during a median duration of follow-up of 9.3 years (interquartile range, 5.9-13.1 years). The 15-year mortality in 30-day survivors was 17.0% (95% CI, 16.2%-17.9%). The standardized mortality rate compared with the general population was 5.1 (95% CI, 4.7-5.4) for ischemic stroke (observed mortality rate 12.0/1000 person-years [95% CI, 11.2-12.9/1000 person-years]; expected rate, 2.4/1000 person-years; excess rate, 9.6/1000 person-years) and the standardized mortality rate for intracerebral hemorrhage was 8.4 (95% CI, 7.4-9.3; observed rate, 18.7/1000 person-years [95% CI, 16.7-21.0/1000 person-years]; expected rate, 2.2/1000 person-years; excess rate, 16.4/1000 person-years).

Conclusions and Relevance  Among young adults aged 18 to 49 years in the Netherlands who were 30-day survivors of first stroke, mortality risk compared with the general population remained elevated up to 15 years later.

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