Table 2 Descriptive statistics of selected variables for the training data set
| Â | Benign | Border-line | Primary invasive | Meta-static |
|---|---|---|---|---|
Variables | N = 563 | N = 40 | N = 121 | N = 30 |
Continuous | Â | Â | Â | Â |
Age, years (median) | 42 | 52.5 | 58 | 59 |
Maximum diameter of mass, mm (median) | 63 | 108 | 98 | 73 |
Maximum diameter of solid part, mm (median) | 0 | 22 | 51 | 54 |
Ordinal | Â | Â | Â | Â |
Number of papillations (mean)# | 0.35 | 1.70 | 1.43 | 0.93 |
Binary | Â | Â | Â | Â |
Ascites (%) | 3.2 | 12.5 | 50.4 | 40.0 |
Entirely solid tumor (%) | 6.6 | 7.5 | 32.2 | 56.7 |
Irregular internal cyst walls (%) | 33.6 | 67.5 | 88.4 | 83.3 |
Personal history of ovarian cancer (%) | 0.9 | 5.0 | 0.8 | 10.0 |
Bilateral tumors (%) | 17.6 | 12.5 | 41.3 | 33.3 |
Papillary structures with blood flow (%) | 6.8 | 47.5 | 43.0 | 23.3 |
Acoustic shadows (%) | 13.0 | 2.5 | 0.0 | 3.3 |
Unilocular tumor without solid component (%) | 40.3 | 2.5 | 0.0 | 0.0 |