一位 45 歲客戶詢問護理師，使用糞便免疫化學檢測（FIT）篩檢大腸癌的建議頻率為何？
A 45-year-old client asks the nurse about the recommended frequency for colorectal cancer screening using a fecal immunochemical test (FIT). How should the nurse respond?
- AEvery 3 years每3年一次
- BEvery 10 years每10年一次
- CAnnually✓ 正解每年一次
- DEvery 5 years每5年一次
大腸癌篩檢指南強調早期發現的重要性。糞便免疫化學檢測（Fecal Immunochemical Test, FIT）是一種非侵入性篩檢工具，其靈敏度與特異度較高。根據美國預防醫學服務工作小組（USPSTF）建議，對於平均風險的成人，若選擇 FIT 作為篩檢方式，必須每年執行一次，以確保檢測的有效性。
Colorectal cancer screening guidelines emphasize the importance of early detection. The fecal immunochemical test (FIT) is a noninvasive screening tool with relatively high sensitivity and specificity. According to the U.S. Preventive Services Task Force (USPSTF), for average-risk adults who choose FIT as their screening modality, it must be performed annually to maintain its effectiveness.
美國對於 FIT 的篩檢頻率要求極為嚴格（每年），台灣健保提供的糞便潛血檢查（iFOBT）建議也是每年一次。兩地在篩檢指引的臨床邏輯上高度一致。