sakineh gholamzadeh community based psychiatric care research center, shiraz university of medical science, shiraz, iran; hamid tengku aizan department of gerontology, university of putra malaysia (upm), malaysia; farkhondeh sharif community based psychiatric care research center, shiraz university of medical science, shiraz, iran; basri hamidon department of medicine, university of putra malaysia (upm), malaysia ibrahim rahimah department of gerontology, university of putra malaysia (upm), malaysia;