Table 2.
Comparison of intergroup qualitative parameters of At-PI in thyroid nodules.
| Benign (n=44) | Malignant (n=83) | χ2/F | P | ||
|---|---|---|---|---|---|
| Enhancement time | Earlier | 3 (6.8%) | 17 (20.5%) | 38.746 | <0.001 |
| Later | 17 (38.6%) | 61 (73.5%) | |||
| Synchronous | 24 (54.5%) | 5 (6.0%) | |||
| Perfusion mode | Centripetal | 14 (31.8%) | 54 (65.1%) | 38.071# | <0.001 |
| Centrifugal | 1 (2.3%) | 18 (21.7%) | |||
| Diffuse types | 29 (65.9%) | 11 (13.3%) | |||
| Early annular enhancement | Presence | 6 (13.6%) | 24 (54.5%) | 3.233 | 0.072 |
| Absence | 38 (86.4%) | 20 (45.5%) | |||
| Perfusion defect assessment | Presence | 23 (27.7%) | 17 (20.5%) | 15.263 | <0.001 |
| Absence | 60 (72.3%) | 66 (79.5%) |
#
Fisher’s precision probability test.