[1] Univ Tokyo, Grad Sch Med, Div Hlth Sci & Nursing, Dept Community Hlth Nursing, 7-3-1 Hongo, Tokyo 1130033, Japan
[2] Univ Hyogo, Dept Stat & Comp Sci, Coll Nursing Art & Sci, Hyogo, Japan
[3] Kyoto Univ, Grad Sch Med, Dept Human Hlth Sci, Kyoto, Japan
[4] Chiba Prefectural Univ Hlth Sci, Fac Healthcare Sci, Dept Nursing, Chiba, Japan
[5] Mejiro Univ, Sch Nursing, Dept Med Stat, Saitama, Japan
[6] Doshisya Univ, Fac Policy Studies, Kyoto, Japan