Table 1 Descriptive statistics of the screen-detected and interval cancer groups. Percentage in each BI-RADS category are calculated excluding the missing/unknown groups
| Â | Screen-Detected Group | Interval Group | P-Value |
|---|---|---|---|
N | 173 | 182 | Â |
Age, years (Standard Deviation) | 57.8 (10.9) | 56.8 (11.8) | 0.28 |
BMI, kg/m2 (Standard Deviation) | 24.9 (4.7) | 23.5 (4.3) | < 0.0001 |
Time to Detection (Days) | 56.3 (81.4) | 239.8 (94.6) | < 0.0001 |
Race: | Â | Â | 0.88 |
 White | 127 | 129 |  |
 African American | 3 | 4 |  |
 Chinese | 25 | 27 |  |
 Filipina | 3 | 3 |  |
 Hispanic | 0 | 2 |  |
 Japanese | 5 | 8 |  |
 Mixed | 5 | 5 |  |
 Other Asian | 2 | 1 |  |
 Other Non-Asian | 3 | 3 |  |
Menopausal status | 119 (69%) | 123 (68%) | 0.69 |
Family history of breast cancer | 47 (23%) | 60 (33%) | 0.25 |
Previous history of breast biopsy | 55 (32%) | 68 (37%) | 0.33 |
BI-RADS Frequency: | Â | Â | 0.008 |
 A: Almost Entirely Fatty | 11 (7.8%) | 3 (1.8%) |  |
 B: Scattered Fibroglandularities | 50 (35.5%) | 33 (19.7%) |  |
 C: Heterogeneously Dense | 61 (43.3%) | 78 (46.7%) |  |
 D: Extremely Dense | 19 (13.5%) | 53 (31.7%) |  |
 Missing Data | 19 | 7 |  |
 Unknown | 13 | 8 |  |