[Eliciting women’s preferences for breast cancer screening]

Over the past decade, the balance between the benefits and harms of breast cancer screening (BCS) has been widely debated. To date, no French study has interrogated women's points of view and preferences (in the economic sense) for this controversial screening. This study aims to bridge this gap. We aimed to elicit women's trade-offs between the benefits and harms of BCS.

A discrete choice experiment questionnaire was developed and administered by a survey institute to French women in order to elicit their preferences and trade-offs between the benefits and risks of BCS (i.e., overdiagnosis and false-positive mammography).

Eight hundred and twelve women, representative of the French general population (age, socioeconomic level, and geographical location), completed the survey. The women would be willing to accept on average 14.1 overdiagnosis cases (median = 9.6) and 47.8 women with a false-positive result (median = 27.2) to avoid one BC-related death. Results from our simulations predict that less than 50% of women would be willing to accept 10 overdiagnosis cases (respectively, 30 women with a false-positive mammography) for one BC-related death avoided.

Women are sensitive to both the benefits and harms of BC screening and their preferences are highly heterogeneous. Providing balanced information on both benefits and harms to women through an informed decision-making process would be more respectful of women's preferences.