Long-term prognosis after stroke: a community-based study in Japan

Area of Science:

• Gerontology
• Neurology
• Public Health

Background:

• Stroke is a primary cause of severe disability among the elderly population.
• Community-based stroke prognosis data is crucial for elderly care and assistance programs.
• Understanding long-term stroke outcomes informs public health strategies and resource allocation.

Purpose of the Study:

• To investigate the prognostic status of stroke patients in community settings.
• To analyze long-term survival, dependency, and independence rates one, three, and five years post-stroke.
• To assess trends in stroke outcomes compared to previous decades and inform care strategies.

Main Methods:

• Identification of 322 incident strokes in six communities between 1987 and 1990.
• Follow-up of 315 stroke patients (98% of identified cases) at one, three, and five years post-onset.
• Data collection on mortality, dependency, independence, and care arrangements for stroke survivors.

Main Results:

• One year post-stroke: 33% mortality, 13% dependency, 54% independence.
• Five years post-stroke: 52% mortality, 9% dependency, 39% independence.
• Poorer long-term prognosis associated with increased age and female sex (except men <55).
• Proportion of dependents remained stable, with increasing home care over time (30% at 1 year, 50% at 3-5 years).
• Estimated prevalence of stroke dependents at 10 per 10,000 population.

Conclusions:

• Stroke outcomes show improved survival and independence compared to the 1970s, likely due to reduced stroke severity.
• The proportion of dependent stroke survivors has not significantly changed, highlighting ongoing care needs.
• Cooperative efforts between families and communities are essential for managing dependent stroke patients under new national insurance schemes.