[1] Univ Tsukuba, Fac Med, Dept Hlth Serv Res, 1-1-1 Tennodai, Tsukuba, Ibaraki 3058575, Japan
[2] Univ Tokyo, Grad Sch Med, Dept Eat Loss Med, Tokyo, Japan
[3] Univ Tokyo, Global Nursing Res Ctr, Grad Sch Med, Tokyo, Japan
[4] Univ Tokyo, Sch Publ Hlth, Dept Clin Epidemiol & Hlth Econ, Tokyo, Japan
[5] Univ Tokyo, Grad Sch Med, Dept Biostat, Tokyo, Japan