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Background: Although immigrant health is an important issue in national health policy, there is a serious shortage of data in many countries. Most studies lack information on educational status, which is a major limitation. This prospective cross-sectional study analyzed a real-world breast cancer population on the influence of immigration background and educational status on participation in breast cancer early detection programs in the federal state of Lower Saxony, Germany., Methods: Data collection was conducted from 2012 to 2016 in six certified breast cancer centers using a standardized questionnaire for patients' interview and tumor-specific data from the patients' medical records., Results: 2,145/3,047 primary breast cancer cases were analyzed. 17.5% of our patients had a history of immigration, including n = 202 first-generation immigrants and n = 168 second-generation immigrants. Most of them were citizens of EU27 member states. No significant difference was seen in age, tumor stage, histology, grading, Ki-67, Her2/neu-status, and hormone receptor status compared to the native cohort. 100% participation rate in the breast cancer early detection programs were seen in patients with no school graduation. With regards to the national mammography screening program, participation decreased significantly with educational status ( p = 0.0003)., Conclusions: No tumor biological differences were seen between immigrants and German natives. In first-generation immigrants, early detection programs were well accepted despite sociocultural and language differences. Participation rate decreased significantly with higher education levels irrespective of country of origin. Immigration background does not have a negative effect on the participation in breast cancer screening. This mainly relates to immigrants from EU27 member states., Competing Interests: The authors declare that they have no conflict of interest., (Copyright © 2020 by S. Karger AG, Basel.)