APOE and dementia: Additionally, the e4e4 association with either COVID-19 outcome was little changed after removing participants with diseases associated with ApoE e4 alleles (4) and COVID-19 severity (5), including dementia, hypertension, coronary artery disease (myocardial infarction or angina), or type 2 diabetes (Table 1), based on diagnoses recorded from baseline self-reports and hospital discharge records during follow-up to March 2017.