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Colorectal cancer (CRC) accounts for 9% of cancer deaths worldwide, making it the second leading cause of cancer death.1 Survival is strongly related to the stage of disease, with up to 90% of CRC deaths estimated to be preventable if the disease is diagnosed at an early stage.2 Randomised controlled trial data show that annual or biennial screening using faecal occult blood testing (FOBT) reduces mortality by up to 27% in those who use the test.3
Smith and colleagues tested the effectiveness of a decision aid in facilitating understanding, involvement and informed choice …
Competing interests None.