JOURNAL ARTICLE

Australian general practitioners' views and use of colorectal cancer screening tests

M J Sladden, J E Ward
Medical Journal of Australia 1999 February 1, 170 (3): 110-3
10065121

OBJECTIVES: To determine general practitioners' (GPs) current beliefs, knowledge and self-reported practices of screening for colorectal cancer.

DESIGN AND SETTING: Postal survey of national random sample of 1271 GPs in 1996.

OUTCOME MEASURES: GP views on effectiveness of faecal occult blood testing (FOBT) and flexible sigmoidoscopy in reducing premature death from colorectal cancer in "average-risk" patients (asymptomatic with no family history); views on frequency of tests and target group; use of these tests; and independent predictors of views and use.

RESULTS: Response rate was 67%. FOBT and flexible sigmoidoscopy were said to be effective as screening tests by 38% and 61% of GPs, respectively, but 30% and 25% were unsure. Independent predictors of belief in screening effectiveness were State of practice (for FOBT), male sex and awareness of Gut Foundation guidelines (for flexible sigmoidoscopy) and increasing age (for both). Most often chosen screening frequencies were every year for FOBT (29%), and five-yearly for flexible sigmoidoscopy (24%), although 19% and 26%, respectively, were unsure of the appropriate screening interval. Most often cited target group was people aged over 40 years with first-degree relatives with colorectal cancer: 63% of GPs would offer FOBT and 74%, flexible sigmoidoscopy. Fewer than 3% of GPs were likely to adopt an opportunistic approach to screening, yet 15% would be highly likely to recommend FOBT during a dedicated health check-up for a 58-year-old male patient, and 9% for a female patient.

CONCLUSION: The absence to date of a coherent national policy on colorectal cancer screening is associated with wide variations in views and practice that are inconsistent with the available evidence. If GPs are to be involved in implementing population screening, national policy must be widely and effectively promulgated.

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