Mathieu E, Barratt A, Davey HM, McGeechan K, Howard K, Houssami N. (2007). Informed choice in mammography screening: a randomized trial of a decision aid for 70-year-old women. Archives of Internal Medicine, 167 (19), 2039-2046.
Thinking About Continuing Mammography Screening for Breast Cancer? A Decision Aid for 70-Year-Old Women
|Program Title||Thinking About Continuing Mammography Screening for Breast Cancer? A Decision Aid for 70-Year-Old Women|
|Purpose||Designed to enhance knowledge in the decision making process for breast cancer screening. (2007)|
|Program Focus||Awareness building and Improve decision making|
|Topic||Informed Decision Making, Breast Cancer Screening|
|Age||This information has not been reported.|
|Gender||This information has not been reported.|
|Race/Ethnicity||This information has not been reported.|
|Setting||This information has not been reported.|
|Funded by||National Health and Medical Research Council of Australia (Grant number(s): 211205)|
|User Reviews||(Be the first to write a review for this program)|
Thinking About Continuing Mammogram Screening for Breast Cancer? A Decision Aid for 70-Year-Old Women is a booklet developed in Australia to help women who are 70 years and older decide whether they want to continue having mammograms to screen for breast cancer. The decision aid is a paper booklet that contains (1) educational information about mammography risks and benefits, (2) a worksheet to help women clarify their personal values toward those risks and benefits before deciding whether to continue screening, (3) hypothetical examples of how other people might make the decision, and (4) an appendix. Information on breast cancer screening options and outcomes is presented in a factual, non-directive way.
The screening outcomes presented in the Decision Aid (e.g., numbers of breast cancers detected and breast cancer deaths) are derived from a Markov model estimating outcomes for women who either continue screening for another 10 years (from age 69 to 79 years) or stop screening at 69 years, having previously been regular participants in screening. This model assumes a 37% relative risk reduction in breast cancer mortality for screened women, which includes adjustment for 100% participation in screening, and allows for the impact of declining life expectancy with age on the benefit of screening. Health care providers and policy makers in countries other than Australia may want to consider using their own data to develop numerical estimates for their populations.
The Decision Aid can be accessed online free of charge.
For costs associated with this program, please contact the developer, Erin Mathieu. (See products page on the RTIPs website for developer contact information.)
In an Australian study, potential participants were selected at random from records from BreastScreen NSW (part of BreastScreen Australia, a national population program which women access directly without physician referral). Women were eligible to participate if they were aged 7071 years, had undergone two screening mammograms in the past 5 years, were due for their next mammogram within the next 3 months, and had not previously been diagnosed with breast cancer. After a baseline structured telephone interview to determine eligibility, 734 women were randomized to the intervention group (n=367) or control group (n=367). Women in the control group received the standard BreastScreen NSW brochure, which contains a small amount of information regarding screening at different ages, but no numeric information about the outcomes of screening.
Women were classified as making an informed choice if they had adequate knowledge and clearly defined values (based on the Values Clarity Subscale of the Decisional Conflict Scale) and expressed an intention to either continue or stop mammography screening. Knowledge of the benefits and harms of screening for women over age 70 was measured using four descriptive/concept questions (e.g., Do screening mammograms detect every breast cancer?) and five quantitative/numerical questions (e.g., Imagine 1,000 average healthy women, aged 70 years. How many of these women do you think will die from breast cancer over the next 10 years without mammography screening?). Answers were scored using a marking scheme developed a priori, producing a score from 0 to 10, with a score of 6 or higher indicating adequate knowledge of the issues surrounding mammography screening.
This program was only evaluated for the RTIPs topic area, Informed Decision Making and not, Breast Cancer Screening.
- At post-test, 73% of women in the intervention group had made an informed choice about whether to continue or stop mammography screening (i.e., had adequate knowledge, clearly defined values, and expressed an intention to either continue or stop mammography screening), compared with 49% of women in the control group (p<.001).
- From pre-test to post-test, women in the intervention group demonstrated a larger gain in mammography screening knowledge compared with women in the usual care group (p<.001). The percentage of women considered to have adequate knowledge (i.e., a score of at least 6 out of 10) was 76.6% in the intervention group, compared with 56.9% in the control group (p<.001).
Please click on the related program(s) to review.
- They are by the same developer/investigator with the same theoretical basis, focus but have different materials that are designed for different target audiences.
Smith, S, Barratt, A, Trevena, L, Simpson, JM, Jansen, J, McCaffery, K.J. (2012). A theoretical framework for measuring knowledge in screening decision aid trials. Patient Education & Counseling, 89 (2), 330-336.
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