1. From the Department of Health Science (T.C.T., A.H., N.R.), Shiga University of Medical Science, Shiga, Japan; the Department of Preventive Cardiology (T.C.T., Y. Kokubo, A.H., M.W., T.O.), National Cerebral and Cardiovascular Center, Osaka, Japan; and the Department of Medical Statistics (Y. Murakami), Shiga University of Medical Science, Shiga, Japan.