Résumé :
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[BDSP. Notice produite par INIST-CNRS gC4R0xb9. Diffusion soumise à autorisation]. Background : Screening programmes are often actively promoted to achieve high coverage, which may result in unrealistic expectations. We examined women's understanding of the likely benefits of mammography screening. Methods : Telephone survey of random samples of the female population aged>=15 years in the US, UK, Italy, and Switzerland using three closed questions on the expected benefits of mammography screening. Results : A total of 5964 women were contacted and 4140 women (69%) participated. Misconceptions were widespread : a majority of women believed that screening prevents or reduces the risk of contracting breast cancer (68%), that screening at least halves breast cancer mortality (62%), and that 10 years of regular screening will prevent 10 or more breast cancer deaths per 1000 women (75%). In multivariate analysis higher number of correct answers was positively associated with higher educational status (odds ratio [OR]=1.44,95% CI : 1.25,1.66) and negatively with having had a mammography in the last 2 years (OR=0.86,95% CI : 0.73,1.01). Compared with US women (reference group) and Swiss women (OR=0.98,95% CI : 0.82,1.18) respondents in Italy (OR=0.61,95% CI : 0.50,0.74) and the UK (OR=0.73,95% CI : 0.60,0.88) gave fewer correct answers. Conclusion : In the US and three European countries a high proportion of women overestimated the benefits that can be expected from screening mammography. This finding raises doubts on informed consent procedures within breast cancer screening programmes.
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