Effect of radiologist experience on the risk of false-positive results in breast cancer screening programs

  1. Alberdi, Raquel Zubizarreta 1
  2. Llanes, Ana B. Fernández 1
  3. Ortega, Raquel Almazán 1
  4. Expósito, Rubén Roman 2
  5. Collado, Jose M. Velarde 2
  6. Verdes, Teresa Queiro 3
  7. Ramos, Carmen Natal 4
  8. Sanz, María Ederra 5
  9. Trejo, Dolores Salas 6
  10. Oliveres, Xavier Castells 2
  1. 1 Galician Breast Cancer Screening Programme, Public Health and Planning Directorate, Health Office, Galicia, Spain
  2. 2 Institut Municipal d'Investigació Mèdica-Parc de Salut Mar. CIBERESP, Department of Epidemiology and Evaluation, Barcelona, Spain
  3. 3 Galician Agency for Health Technology Assessment, Public Health and Planning Directorate, Health Office, Galicia, Spain
  4. 4 Principality of Asturias Breast Cancer Screening Programme, Principality of Asturias, Spain
  5. 5 Navarra Breast Cancer Screening Programme, Public Health Institute, Pamplona, Spain
  6. 6 Valencia Breast Cancer Screening Programme, General Directorate Public Health, Centre for Public Health Research (CSISP), Valencia, Spain
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Revista:
European Radiology

ISSN: 0938-7994,  1432-1084

Ano de publicación: 2011

Volume: 21

Número: 10

Páxinas: 2083-2090

Tipo: Artigo

DOI: 10.1007/S00330-011-2160-0 GOOGLE SCHOLAR lock_openAcceso aberto editor

Outras publicacións en: European Radiology

Resumo

Objectives: To evaluate the effect of radiologist experience on the risk of false-positive results in population-based breast cancer screening programmes. Methods: We evaluated 1,440,384 single-read screening mammograms, corresponding to 471,112 women aged 45-69 years participating in four Spanish programmes between 1990 and 2006. The mammograms were interpreted by 72 radiologists. Results: The overall percentage of false-positive results was 5.85% and that for false-positives resulting in an invasive procedure was 0.38%. Both the risk of false-positives overall and of false-positives leading to an invasive procedure significantly decreased (p<0.001) with greater reading volume in the previous year: OR 0.77 and OR 0.78, respectively, for a reading volume 500-1,999 mammograms and OR 0.59 and OR 0.60 for a reading volume of >14,999 mammograms with respect to the reference category (<500). The risk of both categories of false-positives was also significantly reduced (p<0.001) as radiologists' years of experience increased: OR 0.96 and OR 0.84, respectively, for 1 year's experience and OR 0.72 and OR 0.73, respectively, for more than 4 years' experience with regard to the category of <1 year's experience. Conclusion: Radiologist experience is a determining factor in the risk of a false-positive result in breast cancer screening.

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