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Therapeutic Advances in Gastroenterology
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Perception of colorectal cancer risk does not enhance participation in screening

Keith Dear

National Centre for Epidemiology and Population Health, The Australian National University, Canberra, Australia, keith.dear{at}anu.edu.au

Leitha Scott

Gastroenterology and Hepatology Unit, The Canberra Hospital, Garran, Australia

Sharon Chambers

Gastroenterology and Hepatology Unit, The Canberra Hospital, Garran, Australia

Mike C. Corbett

Gastroenterology and Hepatology Unit, The Canberra Hospital, Garran, Australia

Doug Taupin

Gastroenterology and Hepatology Unit, The Canberra Hospital, Garran, Australia

High participation is a key requirement for effective cancer screening. Many strategies to improve participation hold that a person's knowledge and beliefs dictate screening behavior. We compared perception of colon cancer risk in participants and nonparticipants in a population-based study of screening colonoscopy, and also assessed past screening behavior. Surprisingly, while past screening behavior was a predictor of participation, we found that participants perceived their risk of colorectal cancer to be significantly and substantially lower than the real figure and that of nonparticipants. Our data suggest that health promotion strategies aimed at improving health knowledge may not be effective in improving population screening rates.

Key Words: colorectal cancer screening • colonoscopy • health knowledge/attitudes/practice • patient participation/psychology • mass screening • questionnaires

Therapeutic Advances in Gastroenterology, Vol. 1, No. 3, 157-167 (2008)
DOI: 10.1177/1756283X08097776
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