Table 2.
Number of mammograms classified in each category in the first and second measurements | |||||
---|---|---|---|---|---|
Second measure | |||||
First measure | II | III | IV | V | Total |
II | 12 | 9 | 0 | 0 | 21 |
III | 4 | 170 | 16 | 8 | 198 |
IV | 0 | 4 | 114 | 6 | 124 |
V | 0 | 8 | 9 | 15 | 32 |
Total | 16 | 191 | 139 | 29 | 375 |
Kappa-statistic estimation | |||||
Agreement | Kappa (95% CI) | Weighted Kappa (95% CI) | Kappa high/low risk (95% CI) | ||
Observed % | Expected % | ||||
82.93 | 40.05 | 0.715 (0.649-0.772) | 0.707 (0.623-0.781) | 0.800 (0.739-0.861) |
Low risk categories:
I: Mammogram composed of scalloped contours with some lucent areas of fatty replacement and 1 mm evenly distributed nodular densities.
II: Mammogram composed almost entirely of lucent areas of fatty replacement and 1-mm evenly distributed nodular densities.
III: Prominent ducts in the retroareolar area.
High risk categories:
IV: Extensive, nodular and linear densities with nodular size larger than normal lobules.
V: Homogeneous ground-glass-like appearance with no perceptible features.