Data collection
The recording of demographic information, physical examination
(including height, weight, and blood pressure), and head MRI were
performed during a single interview. The following general information
was obtained: age, sex, height, weight, body mass index (BMI), smoking
(defined as having smoked >100 cigarettes in a lifetime),
alcohol consumption (defined as consuming >30 g of alcohol
per week for one year or longer), hypertension, diabetes,
hyperlipidemia, stroke, coronary heart disease, myocardial infarction,
and arrhythmia 19.