from Medical topics
Published online by Cambridge University Press: 18 December 2014
Secondary prevention, or the early discovery of cancer through screening, is based on the idea that identifying a disease before symptoms develop will enable early treatment and extended survival. Screening tests to detect cancer have increased in number over the last decade, and technological advances are certain to produce many more such tests in the decade ahead. In fact, the development of technologies useful for cancer detection has outpaced research demonstrating the value of those new technologies. As a consequence, different screening tests are associated with different levels of uncertainty about whether they can accurately detect cancer and reduce deaths from cancer.
Reducing cancer deaths is an important goal. Cancer is the second leading cause of death in industrialized countries (ACS, 2004a), cancer treatment often creates significant psychological and physical suffering, and survivors continue to show poorer health outcomes compared to people who have not experienced cancer for years after treatment (Yabroff et al., 2004) (see ‘Cancer: general’). Given the potential importance of cancer screening in reducing mortality, we raise four questions: (a) What effective cancer screening tests are available? (b) How can we encourage people to adopt cancer screening behaviours? (c) What are the psychological consequences of cancer screening? and (d) What are the important directions for future psychological research concerning cancer screening?
Cancer screening technologies
An ideal cancer screening technique is reliable and accurate, carries little or no risk, allows for early detection which can lead to cancer prevention, and is inexpensive.
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