Blar i forfatter "Bjurstam, Nils"

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    • Different measures of smoking exposure and mammographic density in postmenopausal Norwegian women : a cross-sectional study 

      Bremnes, Yngve; Bjurstam, Nils; Ursin, Giske; Gram, Inger Torhild (Journal article; Tidsskriftartikkel; Peer reviewed, 2007-10-26)
      Background: Recent cohort studies have suggested an increased risk of breast cancer with long duration of smoking, and with smoking initiation before first birth. Cigarette smoking may have both carcinogenic effects and antiestrogenic effects on the breast tissue. We decided to examine the relationship between different measures of smoking exposure and mammographic density. Methods: Lifetime ...

    • Percentage density, Wolfe's and Tabár's mammographic patterns. Agreement and association with risk factors for breast cancer 

      Gram, Inger Torhild; Ursin, Giske; Maskarinec, Gertraud; Bremnes, Yngve; Bjurstam, Nils; Lund, Eiliv (Journal article; Tidsskriftartikkel; Peer reviewed, 2005-08-25)
      Introduction: The purpose of this report was to classify mammograms according to four methods and to examine their agreement and their relationship to selected risk factors for breast cancer. Method: Mammograms and epidemiological data were collected from 987 women, aged 55 to 71 years, attending the Norwegian Breast Cancer Screening Program. Two readers each classified the mammograms according ...