Taking lung cancer as another example, most people believe that smoking is a risk factor for lung cancer (the rate is ten times higher than among non-smokers). But in Taiwan, for every nine women with lung cancer, only one is a smoker.
再以肺癌為例，一般認為抽煙是肺癌的危險因子（罹癌機率為一般人的 10 倍），但台灣每 9 位罹患肺癌的女性中，只有一位抽煙。