Abstract
Introduction We hypothesized that, like apolipoprotein E (APOE), other late-onset Alzheimer's disease (LOAD) genetic susceptibility loci predict mortality. Methods We used a weighted genetic risk score (GRS) from 21 non-APOE LOAD risk variants to predict survival in the Adult Changes in Thought and the Health and Retirement Studies. We meta-analyzed hazard ratios and examined models adjusted for cognitive performance or limited to participants with dementia. For replication, we assessed the GRS-longevity association in the Cohorts for Heart and Aging Research in Genomic Epidemiology, comparing cases surviving to age ≥90 years with controls who died between ages 55 and 80 years. Results Higher GRS predicted mortality (hazard ratio = 1.05; 95% confidence interval: 1.00–1.10, P =.04). After adjusting for cognitive performance or restricting to participants with dementia, the relationship was attenuated and no longer significant. In case-control analysis, the GRS was associated with reduced longevity (odds ratio = 0.64; 95% confidence interval: 0.41–1.00, P =.05). Discussion Non-APOE LOAD susceptibility loci confer risk for mortality, likely through effects on dementia incidence.
Original language | English (US) |
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Pages (from-to) | 188-195 |
Number of pages | 8 |
Journal | Alzheimer's and Dementia: Diagnosis, Assessment and Disease Monitoring |
Volume | 8 |
DOIs | |
State | Published - 2017 |
Keywords
- APOE
- Adult Changes in Thought (ACT)
- Alzheimer's disease
- Cohorts for Heart and Aging Research in Genomic Epidemiology (CHARGE)
- Collider stratification bias
- Genetic risk score
- Genome-wide association study (GWAS)
- Health and Retirement Study (HRS)
- Longevity
- Mortality
- Selection bias
- Survival analysis
- Survivor bias
ASJC Scopus subject areas
- Clinical Neurology
- Psychiatry and Mental health