Time from breast cancer diagnosis to treatment among Idaho's National Breast and Cervical Cancer Early Detection Program population, 2011-2017

Purpose Idaho's Women's Health Check (WHC) Program provides breast and cervical cancer screening to under- and uninsured women via funding from the National Breast and Cervical Cancer Early Detection Program (NBCCEDP). Because WHC serves populations with less access to health care, this study evaluated time from breast cancer diagnosis to treatment for women enrolled in the WHC program and linked to Cancer Data Registry of Idaho (CDRI) case data (WHC-linked) and the remainder of female Idaho resident breast cases. Methods Among Idaho residents aged 50-64 years diagnosed during 2011-2017 with ductal carcinoma in situ or invasive breast cancer, we assessed differences in the median time from definitive diagnosis to treatment initiation overall and by demographic and tumor characteristics, and differences in the distribution of demographic and tumor-related variables between 231 WHC-linked and 3,040 non-linked breast cancer cases. Results WHC-linked cases were significantly less likely to be non-Hispanic white, and more likely to live in poorer census tracts, be diagnosed at a later stage, and be treated with mastectomy. Most WHC-linked (92%) and non-linked women (94%) began treatment within 60 days of diagnosis; no differences in time to treatment were observed. Conclusion Disparities in the interval from definitive diagnosis to breast cancer treatment initiation were not observed for women enrolled in the WHC program relative to other Idaho women.