eISSN: 1896-9151
ISSN: 1734-1922
Archives of Medical Science
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vol. 13
Public health

The impact of the Polish mass breast cancer screening program on prognosis in the Pomeranian Province

Piotr Woźniacki, Jarosław Skokowski, Krzystof Bartoszek, Anna Kosowska, Leszek Kalinowski, Janusz Jaśkiewicz

Arch Med Sci 2017; 13, 2: 441–447
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Introduction: Mammographic screening results in diagnosis of less advanced breast cancer (BC). A meta-analysis of randomized clinical trials confirmed that BC screening reduces mortality. In 2007, the National Breast Cancer Screening Program (NBCSP) was established in Poland with the crucial aim of reducing mortality from BC. The purpose of this study was to assess the impact of participation in the NBCSP on prognosis.

Material and methods: A single institution, non-randomized retrospective study was undertaken. The study population comprised 643 patients with BC treated in the Department of Surgical Oncology (DSO) at the Medical University of Gdansk over a 4-year period, from 01.01.2007 until 31.12.2010. Patients were divided into two groups: group A – patients who participated in the NBCSP (n = 238, 37.0%); and group B – patients who did not participate in the NBCSP (n = 405, 63.0%).

Results: Statistical analysis revealed that group A displayed a less advanced AJCC stage (more patients in AJCC stage I, p = 0.002), lower tumor diameter (more patients with pT1, p = 0.006, and pT < 15 mm, p = 0.008) and a lower incidence of metastases to axillary lymph nodes (more patients with pNO, p = 0.01). From 2009 to 2010 the NBCSP revealed a statistically significant benefit – significantly more patients in stage 0 + I (60.7% vs. 48.8%, p = 0.018) and with tumors pT < 15 mm (48.8% vs. 35.1%, p = 0.011) were observed in group A.

Conclusions: The study results revealed the beneficial impact of the NBCSP. Superior prognostic factors and favorable staging were observed in women who participated in the NBCSP.

breast cancer, screening, mass screening, prognostic factors, AJCC staging, prognosis

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