Table 1 Demographic Data of 5601 Nodules in This Study.
Nodules | Total (N = 5601) | Benign (N = 4512) | Malignant (N = 1089) | P |
|---|---|---|---|---|
Number of patients | 4989 | 3991 | 998 | |
Age (years) | 53.4 ± 12.7 | 54.6 ± 13.1 | 48.8 ± 13.9 | < .001 |
No. of female patients (%) | 4627 (82.6%) | 3793 (84.1%) | 834 (76.6%) | < .001 |
Mean maximal nodule size (mm) | 20.7 ± 10.8 | 21.1 ± 10.7 | 19.1 ± 11.1 | < .001 |
US echotexture of nodules | < .001 | |||
Homogeneous | 4274 (76.3%) | 3492 (77.4%) | 782 (71.8%) | |
Heterogeneous | 1327 (23.7%) | 1020 (22.6%) | 307 (28.2%) | |
US echogenicity of nodulesa | < .001 | |||
Marked hypoechogenicity | 315 (5.6%) | 111 (2.5%) | 204 (18.7%) | |
Moderate hypoechogenicity | 705 (12.6%) | 365 (8.1%) | 340 (31.2%) | |
Mild hypoechogenicity | 994 (17.7%) | 760 (16.8%) | 234 (21.5%) | |
Iso- or hyperechogenicity | 3587 (64.0%) | 3276 (72.6%) | 311 (28.6%) | |
