中國癌症診斷時的年齡分布（歲）

從圖上各年齡組的分布可以看出，年齡是最大的危險因素，大多數癌症在５０到６４年齡開始增加，６５歲以上為癌症高發年齡！

Aging is the single biggest risk factor for developing cancer. However, the aging process is complex, and each person ages at a different rate. This means your actual age may not reflect your physiologic age, which can be estimated based on how well your body is functioning both physically and mentally.