Background: The US Preventive Services Task Force does not recommend routine annual mammography screening for women aged 40-49 at average risk. Little research has been done to develop theory-based communication interventions to facilitate informed decision-making about reducing potentially low-value mammography screening.
Purpose: Evaluate the effects of theory-based persuasive messages on women's willingness to consider delaying screening mammography until age 50 or have mammograms biennially.
Methods: We conducted a randomized controlled communication experiment online with a population-based sample of U.S. women aged 40-49 (N = 383) who screened to be at average risk for breast cancer. Women were randomly assigned to the following messaging summaries: annual mammography risks in 40s (Arm 1, n = 124), mammography risks plus family history-based genetic risk (Arm 2, n = 120), and mammography risks, genetic risk, and behavioral alternatives (Arm 3, n = 139). Willingness to delay screening or reduce screening frequency was assessed post-experiment by a set of 5-point Likert scale items.
Results: Women in Arm 3 reported significantly greater willingness to delay screening mammography until age 50 (mean = 0.23, SD = 1.26) compared with those in Arm 1 (mean = -0.17, SD = 1.20; p = .04). There were no significant arm differences in willingness to reduce screening frequency. Exposure to the communication messages significantly shifted women's breast cancer-related risk perceptions without increasing unwarranted cancer worry across all three arms.
Conclusions: Providing women with screening information and options may help initiate challenging discussions with providers about potentially low-value screening.
Keywords: Breast cancer; Cancer screening; De-implementation; Health communication; Mammography screening; Precision public health.
The US Preventive Services Task Force does not recommend routine annual mammography screening for women aged 40–49 at average risk. This study aimed to assess the impact of theory-based persuasive messages on women’s willingness to delay mammography screening until age 50 or opt for biennial screenings. In a randomized online experiment, 383 U.S. women aged 40–49 at average risk for breast cancer were assigned to three different message groups. The results showed that women exposed to messaging that included mammography risks, family history-based genetic risk, and behavioral alternatives were significantly more willing to delay screening until age 50. However, there were no significant differences in willingness to reduce screening frequency. The tested communication messages effectively shifted women’s breast cancer-related risk perceptions without causing unnecessary worry. Providing women with screening information and options may help initiate challenging discussions with providers about potentially low-value screening.
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