[1] Natl Cheng Kung Univ, Coll Med, Inst Gerontol, Tainan, Taiwan
[2] Natl Cheng Kung Univ, Coll Management, Dept Stat, Tainan, Taiwan
[3] Hong Kong Polytech Univ, WHO, Collaborating Ctr Community Hlth Serv, Sch Nursing, Hong Kong, Peoples R China
[4] Hong Kong Polytech Univ, Sch Nursing, Hong Kong, Peoples R China
[5] Georgia State Univ, Byrdine F Lewis Coll Nursing & Hlth Profess, Sch Nursing, Atlanta, GA USA
[6] Hong Kong Polytech Univ, WHO, Sch Nursing, Collaborating Ctr Community Hlth Serv, 11 Yuk Choi Rd, Hong Kong 999077, Peoples R China