Abstract With over 2 million cases diagnosed annually, breast cancer is a leading cause of cancer-related disability and mortality. Despite global efforts to implement mammography screening programs, uptake rates vary widely across settings due to socioeconomic factors and accessibility challenges. To improve participation, targeted interventions addressing barriers faced by underserved groups are essential for promoting inclusive screening and early detection. As part of the ENTER project, which aims to address disparities in breast cancer screening participation among women with low socioeconomic status (SES) in Flanders, Belgium, we conducted a systematic review and meta-analysis on the effectiveness of interventions to enhance mammography uptake. To explore the differential impact of interventions on mammography uptake among vulnerable groups, including individuals with low SES, underinsured, with immigrant background or part of an ethnic minority, subgroup analyses were performed. 7 databases were searched, resulting in the inclusion of 54 out of 9,366 papers for analysis. 14 types of interventions were identified. The meta-analysis showed significant pooled effects of interventions that increased mammography uptake [OR 1.8 (95%CI 1.6-2.2)], particularly among vulnerable populations [OR 2.2 (95%CI 1.7-2.8)]. The most effective interventions were educational interventions [OR 3.03 (95%CI 2.2-4.9); in vulnerable groups OR 2.7 (95%CI 1.9-3.9)]. As expected, interventions adapted to linguistic needs and culturally sensitive approaches showed a significant effect among vulnerable target groups [OR 2.9 (95%CI 1.1-7.9) and OR 2.5 (95%CI 1.1-5.6), respectively]. Reminders were also highly effective [OR 1.8 (95%CI 1.5-2.1); in vulnerable groups OR 2.5 (95%CI 1.9-3.1)]. This review underscores the critical role of targeted interventions in augmenting screening mammography uptake, particularly among vulnerable populations, where odds of participation can increase by up to 2-3 times. Key messages • Interventions adapted to the linguistic needs of the target population and culturally sensitive approaches, aligned with values and beliefs of a specific community, can greatly enhance screening rates. • Considering costs, practicality and impact, reminder letters with culturally and linguistically adapted content emerged as the most promising option for implementation in the ENTER project.
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