Skip to main content

Table 2 Selected characteristics of screen-detected and interval cancers

From: Mammographic features associated with interval breast cancers in screening programs

  Mean (SD) Pvaluea
Screen detected N?=?718 Interval cancers N?=?125
Age (years) 57.2 (9.0) 52.8 (8.3) <0.0001
Body mass index (kg/m2) 25.3 (4.3) 23.9 (3.5) 0.0008
Age at menarche (years) 12.9 (1.5) N?=?701 12.8 (1.6) N?=?122 0.76
Parity (% parous) 84.3 82.4 0.60
Age at first live birth (years) 24.7 (4.6) N?=?605 24.7 (4.8) N?=?103 0.96
Number of live births 2.53 (1.8) 2.32 (1.6) 0.24
Menopausal status (% post-menopausal) 78.3 57.6 <0.0001
Age at menopause (years) 46.7 (6.8) N?=?496 47.1 (5.9) N?=?67 0.49
Current use of HRTb (% yes) 18.3 20.8 0.50
Previous breast biopsy (% yes) 16.6 N?=?709 21.8 N?=?124 0.17
First-degree relatives with breast cancer (% yes) 20.6 N?=?714 20.0 0.88
Percent mammographic density 30.3 (19.1) 42.2 (20.4) <0.0001
Dense area (cm2) 36.7 (25.6) 45.3 (28.5) 0.001
Non-dense area (cm2) 100.4 (60.1) 67.2 (44.6) <0.0001
Total area (cm2) 137.0 (60.4) 112.5 (54.2) <0.0001
  1. aP value is from the univariable logistic regression model analysis of risk of interval vs. screen-detected breast cancer; bhormone replacement therapy.