Ten thousand eight hundred and eighty two adults were purposively sampled from four geographic regions: Taipei area, Taizhong area, Kaohsjung area and eastern area of Taiwan.

• 本研究之对象为大台北地区、大台中地区、大高雄地区及花东地区18岁以上的成年人，以立意抽样方式进行问卷调查，发出问卷10；882份，回收有效问卷7；888份(72.；48%25)。