Table 6.
Interobserver agreement according to the radiologist’s experience in the tests performed in the first year of the MUST-BE trial
| Final assessment | κ-valuea) |
|||
|---|---|---|---|---|
| Initially modified categorization |
Re-modified categorization |
|||
| Junior (<10 yr) | Senior (>10 yr) | Junior (<10 yr) | Senior (>10 yr) | |
| Category 2 | 0.451 (0.288-0.616) | 0.457 (0.311-0.599) | 0.781 (0.675-0.878) | 0.807 (0.717-0.890) |
| Category 3 | 0.401 (0.263-0.540) | 0.410 (0.298-0.519) | 0.557 (0.403-0.722) | 0.503 (0.327-0.644) |
| Category 4 | 0.584 (0.464-0.716) | 0.528 (0.439-0.627) | 0.593 (0.476-0.717) | 0.620 (0.524-0.708) |
| Category 5 | 0.790 (0.564-0.928) | 0.612 (0.416-0.779) | 0.586 (0.229-0.839) | 0.542 (0.334-0.716) |
| Overall | 0.528 (0.431-0.641) | 0.490 (0.413-0.577) | 0.643 (0.553-0.737) | 0.648 (0.568-0.726) |
| Interpretation after dichotomization as benigna) and suspiciousb) lesions | 0.680 (0.571-0.794) | 0.659 (0.571-0.742) | 0.680 (0.579-0.800) | 0.756 (0.669-0.841) |
| Subcategorization of category 4 | ||||
| Category 4a | 0.601 (0.342-0.880) | 0.437 (0.244-0.681) | 0.542 (0.349-0.730) | 0.478 (0.335-0.625) |
| Category 4b | 0.340 (0.088-0.648) | 0.044 (0.040-0.167) | 0.184 (0.030-0.374) | 0.251 (0.129-0.388) |
| Category 4c | 0.485 (0.164-0.762) | 0.313 (0.118-0.531) | 0.397 (0.105-0.650) | 0.593 (0.392-0.770) |
| Overall subcategorization | 0.477 (0.276-0.714) | 0.270 (0.136-0.444) | 0.375 (0.227-0.553) | 0.423 (0.307-0.537) |
Numbers in parentheses are the 95% confidence intervals.
MUST-BE, Mammography and Ultrasonography Study for Breast Cancer Screening Effectiveness.
a)
Benign lesions were category 2 or 3.
b)
Suspicious lesions were category 4 or 5.