Table 3. Results with regard to the variables included in LR1, LR2 and the Simple Rules in benign and malignant adnexal masses.
Variable | Statistics | Benign (1423, 59%) | Malignant (980, 41%) |
---|---|---|---|
Variables in LR1 and LR2 | |||
Age (years) | Median (IQR) | 44 (33–56) | 57 (46–66) |
Largest diameter of lesion (mm) | Median (IQR) | 64 (47–90) | 86 (56–126) |
Solid components | N (%) | 472 (33%) | 915 (93%) |
Largest diameter of solid component if present (mm) |
Median (IQR) |
28 (13–54) |
59 (37–87) |
Colour score (1–4) | |||
Colour score 1 | N (%) | 574 (40) | 32 (3) |
Colour score 2 | N (%) | 563 (40) | 199 (20) |
Colour score 3 | N (%) | 239 (17) | 442 (45) |
Colour score 4 | N (%) | 47 (3) | 307 (31) |
Ascites | N (%) | 18 (1%) | 322 (33%) |
Papillations with detectable blood flow | N (%) | 55 (4%) | 160 (16%) |
Irregular cyst walls | N (%) | 385 (27%) | 572 (58%) |
Acoustic shadows | N (%) | 265 (19%) | 34 (3%) |
Tender mass at ultrasound examination | N (%) | 233 (16%) | 111 (11%) |
Current use of hormonal therapy | N (%) | 153 (11%) | 54 (6%) |
Personal history of ovarian cancer | N (%) | 14 (1%) | 30 (3%) |
Solid tumour |
N (%) |
154 (11%) |
473 (48%) |
Variables in the simple rules | |||
Benign ultrasound features in the simple rules | |||
Unilocular tumour (B1) | N (%) | 595 (42%) | 5 (0.5%) |
Largest diameter of largest solid component <7 mm (B2) | N (%) | 40 (3%) | 2 (0.2%) |
Acoustic shadows (B3) | N (%) | 265 (19%) | 34 (3%) |
Smooth multilocular tumour with largest diameter <100 mm (B4) | N (%) | 224 (16%) | 13 (1%) |
No intratumoural blood flow at colour or power Doppler (B5) |
N (%) |
574 (40%) |
32 (3%) |
Malignant ultrasound features in the simple rules | |||
Irregular solid tumour (M1) | N (%) | 16 (1%) | 189 (19%) |
Ascites (M2) | N (%) | 18 (1%) | 322 (33%) |
At least 4 papillary projections (M3) | N (%) | 27 (2%) | 91 (9%) |
Irregular multilocular solid tumour with largest diameter ⩾100 mm (M4) | N (%) | 40 (3%) | 153 (16%) |
Very strong intratumoural blood flow at colour or power Doppler (M5) | N (%) | 47 (3%) | 307 (31%) |
Abbreviations: IQR=interquartile range; LR1=logistic regression model 1; LR2=logistic regression model 2.