The food environment and postdiagnosis weight gain among Black women breast cancer survivors in Maryland.

Background: Weight management is included in the American Cancer Society/American Society of Clinical Oncology Breast Cancer Survivorship Care Guidelines for its clinical impact on breast cancer (BC) survivorship. Few studies have examined the impact of neighborhood-level factors associated with postdiagnosis weight change among Black BC survivors.

Methods: We recruited 100 Black female BC survivors to complete an online survey, including demographic, clinical characteristics, and lifestyle factors, between January 5, 2022 and August 18, 2022. We utilized the 2023 County Health Rankings Food Environment Index (FEI), which ranges from 0 (worst) to 10 (best), to capture the food environment as the primary exposure for postdiagnosis weight gain. We calculated postdiagnosis weight gain as percent weight change from time at diagnosis to time of survey. Participants were grouped into categories of stable weight (within ± 3%) or weight loss (≤ -3%) compared to weight gain (≥ 3%). We calculated adjusted odds ratios (aORs) for the associations between county-FEI, clinical factors, and postdiagnosis weight gain.

Results: Among the 95 women who reported weight measurements, we observed that women living in counties with an FEI ≥ 8.8 (at or above median) were significantly less likely to experience weight gain (aOR 0.09; 95% CI 0.01-0.77). Stage, age at diagnosis, years since BC diagnosis, and BC treatments were not significantly associated with weight gain.

Conclusion: Postdiagnosis weight gain is associated with poorer food environments among Black BC survivors in Maryland. Our findings will inform larger prospective studies and future interventions among this population.