Relationship between stroke and mortality in dialysis patients

Area of Science:

• Nephrology
• Neurology
• Public Health

Background:

• Stroke is a significant concern for patients undergoing long-term dialysis.
• The impact of stroke on mortality and life expectancy in this population remains incompletely understood.

Purpose of the Study:

• To investigate the association between stroke (ischemic and hemorrhagic) and mortality in patients on long-term dialysis.
• To quantify the years of life lost following a stroke in this cohort.
• To examine potential racial disparities in post-stroke survival.

Main Methods:

• A large cohort of dually eligible (Medicare and Medicaid) patients initiating dialysis between 2000-2005 was established.
• Medicare claims data were used to identify strokes and track mortality.
• A semi-Markov model with an additive hazard extension was employed to analyze stroke-related mortality and survival.

Main Results:

• The study included 69,371 patients with over 112,000 person-years of follow-up.
• Stroke incidence was 21.1 per 1000 patient-years for ischemic and 4.7 for hemorrhagic strokes.
• Thirty-day mortality was 17.9% for ischemic stroke and 53.4% for hemorrhagic stroke. Adjusted hazard ratios for mortality remained significantly elevated for years post-stroke.
• Median years of life lost were 40.7 for hemorrhagic stroke and 34.6 for ischemic stroke.
• No significant difference in post-stroke mortality was observed across racial groups.

Conclusions:

• Long-term dialysis patients experience substantial mortality and reduced life expectancy following a stroke.
• The findings highlight the critical need for stroke prevention and management strategies in the dialysis population.
• Post-stroke mortality in this group is not influenced by race.