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Published on: May 22, 2019
Body mass index and poststroke mortality.
Tom Skyhøj Olsen1, Christian Dehlendorff, Hans Gregers Petersen
1The Stroke Unit, Hvidovre University Hospital, Hvidovre, Denmark. Tom.Skyhoej.Olsen@hvh.regionh.dk
Neuroepidemiology
|March 1, 2008
Summary
Higher body mass index (BMI) in stroke patients is linked to lower mortality. Overweight and obese individuals had better survival rates compared to normal-weight and underweight patients post-stroke.
Area of Science:
- Cardiology
- Neurology
- Public Health
Background:
- Obesity is a known risk factor for cardiovascular disease.
- The relationship between body mass index (BMI) and mortality following a stroke requires further investigation.
Purpose of the Study:
- To examine the association between BMI and all-cause mortality in stroke survivors.
- To determine if different BMI categories impact post-stroke survival rates.
Main Methods:
- Analysis of a Danish registry of 21,884 hospitalized stroke patients with recorded BMI.
- Categorization into five BMI groups: underweight, normal weight, overweight, obese, and severely obese.
- Survival follow-up for up to 5 years using a survival model on 13,242 patients with complete data.
Main Results:
- Compared to normal-weight patients, mortality was lower in overweight (HR 0.73) and obese (HR 0.84) stroke patients.
- Severely obese patients also showed a trend towards lower mortality (HR 0.84).
- Underweight patients had significantly higher mortality (HR 1.63) post-stroke.
Conclusions:
- Post-stroke mortality is inversely associated with BMI.
- Overweight and obese stroke survivors demonstrate a reduced mortality risk compared to normal-weight and underweight individuals.
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