Common-variant Contribution
This metric quantifies the cumulative impact of widespread, frequent genetic differences on the development of a specific disease or physiological trait.
This concept refers to the collective influence of numerous minor genetic alterations that occur frequently across large human populations. Unlike rare mutations that strike a single individual, these common variations exert a subtle but significant pressure on disease susceptibility by slightly modifying biological pathways over time. In the context of Alzheimer's disease, identifying this contribution is vital because it reveals that the underlying drivers are more pervasive across diverse groups than previously assumed. This contrasts with high-penetrance mutations, which are infrequent and cause severe symptoms in a small number of people while having little impact on the general population's risk profile. Also abbreviated as CVC.