Table 2 Selected characteristics of screen-detected and interval cancers
From: Mammographic features associated with interval breast cancers in screening programs
| Â | 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 |