Skip to main content

Table 1 Characteristics of the total study population (N = 51,400) and of women with breast cancer (cases) (N = 301) and without breast cancer (N = 50,099)

From: The combined effect of mammographic texture and density on breast cancer risk: a cohort study

Variable Total study population
Median (IQR)
Breast cancer cases
Median (IQR)
Non breast cancer cases
Median (IQR)
p value
Age (years)a 56 (51–63) 58 (51–63) 56 (51–63) 0.21
Digital screening rounds, number 2 (1–3) 2 (2–3) 2 (1–3) 0.05
Follow up (years)b 4.2 (2.0–6.2) 2.8 (1.9–4.3) 4.2 (2.0–6.2) <0.01
Dense volume (cm3)a 57.8 (42.9–78.9) 63.9 (48.4–86.9) 57.8 (42.9–78.8) <0.01
Percent dense volume (%)a 6.4 (4.8–9.8) 7.5 (5.5–7.5) 6.4 (4.8–9.8) <0.01
Non-dense volume (cm3)a 804.9 (518.6–1183.9) 825.3 (521.8–1159.1) 804.9 (518.5–1184.0) 0.88
Total breast volume (cm3)a 866.9 (573.9–1256.7) 900.8 (592.4–1228.4) 866.8 (573.8–1256.8) 0.88
Texture scorea 0.50 (0.48–0.53) 0.51 (0.49–0.54) 0.50 (0.48–0.53) <0.01
  1. aAt first available digital screening mammogram
  2. bWomen were followed until breast cancer diagnosis (event), till death or till 2 years after the last available mammogram, whichever came first