Table 2.
Characteristics of Breast Cancers Identified in MRI-Screened Cohort and Comparison Group
| Characteristic | MRI Cohort(n = 41) |
Comparison Group(n = 77) |
P | ||
|---|---|---|---|---|---|
| No. | % | No. | % | ||
| Age at diagnosis, years | .9 | ||||
| Mean | 48.1 | 48.3 | |||
| Range | 32-67 | 27-70 | |||
| Type of cancer | |||||
| Invasive | 31 | 76 | 67 | 88 | |
| DCIS | 10 | 24 | 9 | 12 | .08 |
| Size of tumor (invasive), mm | |||||
| 0-5 | 9 | 29 | 5 | 8 | |
| 6-10 | 14 | 45 | 16 | 27 | |
| 11-20 | 7 | 23 | 21 | 36 | |
| 21+ | 1 | 3 | 17 | 29 | .002 |
| Missing | 0 | 8 | |||
| Mean | 0.9 | 1.8 | < .001 | ||
| Range | 0.1-3.0 | 0.1-7.0 | |||
| Nodal status (invasive) | |||||
| Negative | 26 | 87 | 39 | 60 | |
| Positive | 4 | 13 | 26 | 40 | .009 |
| Node-negative and < 2 cm | 35 | 85 | 40 | 54 | |
| Node-positive or ≥ 2 cm | 6 | 15 | 34 | 46 | .004 |
| Missing | 1 | 2 | |||
| ER status (invasive) | |||||
| Positive | 14 | 19 | .83 | ||
| Negative | 16 | 24 | |||
| Equivocal | 0 | 1 | |||
| Unknown | 1 | 20 | |||
Abbreviations: MRI, magnetic resonance imaging; DCIS, ductal carcinoma in situ; ER, estrogen receptor.