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Factors associated with the steep increase in late-midlife stroke occurrence among US men
Amytis Towfighi1, Jeffrey L Saver, Rita Engelhardt
1Stroke Center and Department of Neurology, University of California at Los Angeles Medical Center, Los Angeles, California, USA. towfighi@usc.edu
Insights
Middle-aged men aged 55-64 face higher stroke risks. Elevated serum homocysteine (HCY) is the key predictor for stroke in this age group, suggesting potential for targeted interventions.
Area of Science:
- Cardiology
- Neurology
- Public Health
Background:
- Stroke incidence significantly increases in men aged 55-64 compared to 45-54.
- Understanding risk factors for this midlife stroke increase is crucial.
Purpose of the Study:
- To identify potential risk factors contributing to the rise in stroke occurrence among middle-aged men.
- To analyze stroke prevalence and predictors in men across their midlife years.
Main Methods:
- Analysis of National Health and Nutrition Examination Survey (NHANES) 1999-2004 data.
- Assessment of stroke prevalence, predictors, and vascular risk factors in midlife men.
Main Results:
- Higher glycohemoglobin, hypertension, diabetes, and coronary artery disease history predicted stroke in both 45-54 and 55-64 age groups.
- Unique predictors for 45-54 group: non-white race, low ankle-brachial pulsatility index, severe headache.
- Elevated serum homocysteine (HCY) uniquely predicted stroke in the 55-64 group.
Conclusions:
- Elevated serum HCY is the sole independent stroke predictor for US men aged 55-64.
- Further research on HCY-lowering treatments to reduce midlife stroke risk is recommended.
Background:
Data on recent stroke prevalence rates among middle-aged men in the United States indicate that men aged 55 to 64 years are 3 times more likely than men aged 45 to 54 years to have experienced a stroke. We aimed to determine potential risk factors that may contribute to this steep increase in late midlife stroke occurrence.
Methods:
We analyzed the National Health and Nutrition Examination Survey 1999 to 2004 data sets, assessing stroke prevalence, predictors of stroke occurrence, and vascular risk factors in men across their midlife years.
Results:
Crudely, higher glycohemoglobin, history of hypertension, history of diabetes, and history of coronary artery disease significantly predicted stroke in 45- to 54- and 54-to 64-year-old men. Significant stroke risk factors unique to each age group were non-white race, lower ankle-brachial pulsatility index, and occurrence of recent severe headache in the 45- to 54-year age group, whereas elevated serum homocysteine (HCY) level predicted stroke in those aged 55 to 64 years. In multivariable regression analysis, lower ankle-brachial pulsatility index (odds ratio [OR] 1.69, 95% confidence interval [CI] 1.47-1.83, P < .001) and recent severe headache (OR 5.12, 95% CI 1.3-20.1, P = .019) were the only independent predictors of stroke in the 45- to 54-year age group, whereas only elevated HCY predicted stroke in the 55- to 64-year age group (OR 1.708, 95% CI -1.103-2.643, P = .0163).
Conclusion:
Elevated serum HCY level is the sole independent predictor of stroke among men aged 55 to 64 years in the United States. Further study to assess the efficacy of HCY-lowering treatment in mitigating a steep increase in late midlife stroke occurrence among men may be warranted.
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