Characteristics of Women With Screen-Detected and Interval Cancers
| Characteristic | Women With Screen-Detected Cancers (n = 481) No. (%) | Women With Interval Cancers (n = 143) No. (%) | P Value |
|---|---|---|---|
| GED = graduate equivalent degree; HRT = hormone replacement therapy; CBE = clinical breast examination. | |||
| * Missing: 47 for education (39 screen, 8 interval); 13 for insurance (11 screen, 2 interval); 3 for family history of breast cancer (all screen); 3 for personal history of breast cancer (all screen); 55 for menopausal status and HRT use (41 screen, 14 interval); 24 for breast density (all screen); 85 for time since last mammogram (77 screen, 8 interval), and 296 for time since last CBE (218 screen, 78 interval). | |||
| Age at diagnosis, years | .67 | ||
| ≤39 | 8 (1.7) | 4 (2.8) | |
| 40–49 | 106 (22.0) | 35 (24.5) | |
| 50–59 | 140 (29.1) | 36 (25.2) | |
| 60–69 | 100 (20.8) | 34 (23.8) | |
| ≤70 | 127 (26.4) | 34 (23.8) | |
| Education* | .50 | ||
| Less than high school | 30 (6.8) | 7 (5.2) | |
| High school graduate or GED | 125 (28.3) | 34 (25.2) | |
| Some college or technical school | 128 (29.0) | 48 (35.6) | |
| College or postcollege graduate | 159 (36.0) | 46 (34.1) | |
| Insurance* | .04 | ||
| Yes | 449 (95.5) | 140 (99.3) | |
| No | 21 (4.5) | 1 (0.7) | |
| Family history of breast cancer* | .82 | ||
| Yes | 193 (40.4) | 60 (42.0) | |
| No | 279 (58.4) | 82 (57.3) | |
| Don’t know | 6 (1.3) | 1 (0.7) | |
| Personal history of breast cancer* | <.001 | ||
| Yes | 65 (13.6) | 43 (30.1) | |
| No | 413 (86.4) | 100 (69.9) | |
| Menopausal status and current HRT use* | .58 | ||
| Premenopausal | 119 (27.1) | 35 (27.1) | |
| Postmenopausal, no HRT | 210 (47.7) | 56 (43.4) | |
| Postmenopausal, HRT | 111 (25.2) | 38 (29.5) | |
| Breast density* | .48 | ||
| Fatty | 25 (5.5) | 5 (3.5) | |
| Scattered density | 213 (46.6) | 66 (46.2) | |
| Heterogeneously dense | 184 (40.3) | 56 (39.2) | |
| Extremely dense | 35 (7.7) | 16 (11.2) | |
| Time since the mammogram before the one associated with the cancer diagnosis* | .001 | ||
| Never had one | 22 (5.5) | 2 (1.5) | |
| <1 year | 81 (20.1) | 35 (25.9) | |
| 1–2 years | 228 (56.4) | 89 (65.9) | |
| >2 years | 73 (18.1) | 9 (6.7) | |
| Time since the CBE before the one associated with the cancer diagnosis* | .77 | ||
| Never had one | 4 (1.5) | 2 (3.1) | |
| <1 year | 200 (76.1) | 48 (73.9) | |
| 1–2 years | 47 (17.9) | 13 (20.0) | |
| >2 years | 12 (4.6) | 2 (3.1) | |