Height and Alzheimer's disease: findings from a case-control study

Area of Science:

• Neuroscience
• Genetics
• Epidemiology

Background:

• Alzheimer's disease (AD) is a progressive neurodegenerative disorder.
• The Apolipoprotein E (APOE) genotype is a known genetic risk factor for AD.
• Environmental factors and anthropometric measures may also influence AD risk.

Purpose of the Study:

• To investigate the association between an individual's height and their risk of developing Alzheimer's disease (AD).
• To explore the interplay between height, APOE genotype, and AD risk, stratified by gender.

Main Methods:

• A case-control study involving 239 probable/possible AD patients and 341 healthy controls.
• Height was measured, and risk of AD was modeled based on height quartiles, APOE genotype, education, and birth year.
• Analyses were stratified by gender to identify sex-specific associations.

Main Results:

• Men with AD were significantly shorter than controls (p=0.001).
• For men, the tallest quartile of height was associated with a 59% lower risk of AD compared to the shortest quartile (p=0.03).
• For women without an APOE epsilon4 allele, greater height correlated with reduced AD risk (OR=0.88; p=0.01), but this was not observed in women with an APOE epsilon4 allele.

Conclusions:

• Height may be an independent risk factor for Alzheimer's disease, particularly in men.
• The relationship between height and AD risk is modulated by gender and APOE genotype in women.