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Table 2 Pre- and post-menopausal breast measures and changes in breast measures over menopause (n = 591)

From: The effect of weight change on changes in breast density measures over menopause in a breast cancer screening cohort

  Median (IQR)
  Premenopause at baseline Postmenopause at follow-up Median change over menopausea
Breast density, % 44.6 (27.6; 59.1) 33.6 (16.5; 52.4) −6.8 (−15.6; 0.5)
Dense area, cm2 42.7 (30.4; 57.5) 26.8 (14.5; 37.3) −12.4 (−25.1; −4.1)
Nondense area, cm2 57.3 (36.0; 88.5) 65.4 (34.0; 94.2) 0.3 (−13.2; 14.8)
Breast area, cm2 105.3 (84.2; 133.7) 94.6 (68.0; 120.1) −9.6 (−26.1; 2.1)
Weightb, kg 67.0 (61.0; 73.0) 68.0 (62.0; 75.0) 1.0 (−1.0; 3.5)
  1. IQR interquartile range
  2. aMedian change over menopause is determined by subtracting the pre- from the post-menopausal measures for each woman and then determining the median
  3. bInformation about postmenopausal weight is acquired from the follow-up questionnaire (self-reported). Weight change is the change in weight between the weight reported in the follow-up questionnaire and at baseline