Background, Mortality of colorectal cancer can be reduced by fecal occult blood test.However, mortality reduction is partially due to further evaluation and management after a positive test.

• 背景：大肠直肠癌的死亡率可藉由粪便潜血检查下降，然而，死亡率下降原因，部分是来自于潜血阳性之后的进一步评估与处置。