Additional file 1 of Mammographic density by time and breast: a retrospective cohort study from BreastScreen Norway

Supplementary Material 1: Additional file 1Table S1 ABC. Mean values with standard deviation (SD) and median values with interquartile range (IQR) for (A) Absolute dense volume; (B) Breast volume; and (C) Percent dense volume for breasts developing or not developing screen-detected or interval cancer during three consecutive screening rounds of biennial screening in BreastScreen Norway, 2007–2020. Table S2. Estimates obtained from a linear-mixed regression model with 95% confidence intervals (CI) showing change in absolute (cm3) and percent (%) dense volume on a breast level for 78,182 women screened over three consecutive screening rounds and association with breast cancer in BreastScreen Norway, 2007–2020. Table S3. Spearman correlation coefficient between breast volume and body mass index for 66,596 women with available data, screened in BreastScreen Norway, 2007–2020. Table S4. Estimates obtained from a linear-mixed regression model with 95% confidence intervals (CI) showing change in mean absolute (cm3) and percent (%) dense volume on an individual level for 42,894 women screened over three consecutive screening rounds and association with breast cancer in BreastScreen Norway, 2007–2020.