Abstract
Purpose
Iowa is among several rural Midwestern states with the highest proportions of contralateral prophylactic mastectomy (CPM) in women < 45 years of age. We evaluated the role of rurality and travel distance in these surgical patterns.
Methods
Women with unilateral breast cancer (2007–2017) were identified using Iowa Cancer Registry records. Patients and treating hospitals were classified as metro, nonmetro, and rural based on Rural–Urban Continuum Codes. Differences in patient, tumor, and treatment characteristics and median travel distance (MTD) were compared. Characteristics associated with CPM were evaluated with multivariate logistic regression.
Results
22,158 women were identified: 57% metro, 26% nonmetro and 18% rural. Young rural women had the highest proportion of CPM (52%, 39% and 40% for rural, metro, nonmetro women < 40 years). Half of all rural women had surgery at metro hospitals; these women had the longest MTD (62 miles). Among all women treated at metro hospitals, rural women had the highest proportion of CPM (17% rural vs 14% metro/nonmetro, p = 0.007). On multivariate analysis, traveling ≥ 50 miles (ORs 1.43–2.34) and rural residence (OR = 1.29) were independently predictive of CPM. Other risk factors were young age (< 40 years: OR = 7.28, 95% CI 5.97–8.88) and surgery at a metro hospital that offers reconstruction (OR = 2.30, 95% CI 1.65-3.21) and is not NCI-designated (OR = 2.34, 95% CI 1.92–2.86).
Conclusion
There is an unexpectedly high proportion of CPM in young rural women in Iowa, and travel distance and availability of reconstructive services likely influence decision-making. Improving access to multidisciplinary care in rural states may help optimize decision-making.
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Data availability
Cases were extracted from the Iowa Cancer Registry Surveillance, Epidemiology, and End Results (SEER) Data Management System (SEER*DMS). The datasets generated and/or analyzed during the current study are not publicly available because they contain protected health information of patients, as well as specific names of hospitals. A de-identified version of our analytic dataset could be available from the corresponding author upon reasonable request.
Abbreviations
- CPM:
-
Contralateral prophylactic mastectomy
- UM:
-
Unilateral mastectomy
- MTD:
-
Median travel distance
- SEER:
-
Surveillance, epidemiology, and end results
- CoC:
-
Commission on cancer
- NCDB:
-
National cancer database
- RUCC:
-
Rural–urban continuum codes
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Funding
This work was supported by the National Cancer Institute at the National Institutes of Health (Grant Numbers HHSN261201800012I/ HHSN26100001 to CFL, MEC, ARK; P30 CA086862 to MEC, ARK).
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AK performed primary data analysis and prepared the methods section, tables and figures. EJ assisted in the primary data analysis, literature review and preparation of the manuscript. MC and CL provided expertise in the datasets used, directed the statistical analysis and contributed to the writing of the manuscript. IL and SS were involved in developing study design. IL was the primary manuscript author and SS was a major contributor in writing the manuscript. All authors read, edited and approved the final manuscript.
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This study was granted human subject exemption status by the University of Iowa Institutional Review Board.
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Lizarraga, I.M., Kahl, A.R., Jacoby, E. et al. Impact of age, rurality and distance in predicting contralateral prophylactic mastectomy for breast cancer in a Midwestern state: a population-based study. Breast Cancer Res Treat 188, 191–202 (2021). https://doi.org/10.1007/s10549-021-06105-x
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DOI: https://doi.org/10.1007/s10549-021-06105-x