Table 7. Comparison of Diagnostic Performance for Different Nodule Sizes in Various Guidelines.
| Guideline | Nodule size | Sensitivity (%) |
Specificity (%) |
Positive predictive value (%) |
Negative predictive value (%) |
Accuracy (%) |
|---|---|---|---|---|---|---|
| ACR TI-RADS 2017 | <10 mm | 94.37 | 63.04 | 71.16 | 92.06 | 78.44 |
| ≥10 mm | 92.33 | 84.11 | 67.77 | 96.81 | 86.30 | |
| ATA 2016 | <10 mm | 96.80 | 57.14 | 69.24 | 94.71 | 76.94 |
| ≥10 mm | 95.86 | 74.97 | 57.69 | 98.07 | 80.45 | |
| K-TIRADS 2016 | <10 mm | 94.37 | 62.72 | 70.98 | 92.02 | 78.28 |
| ≥10 mm | 82.58 | 86.51 | 68.90 | 93.21 | 85.46 | |
| C-TIRADS 2020 | <10 mm | 74.17 | 84.48 | 82.20 | 77.19 | 79.41 |
| ≥10 mm | 78.05 | 95.33 | 85.82 | 92.31 | 90.74 |
Data in parentheses are the raw data used to calculate the percentages. ACR-TIRADS 2017, the 2017 Thyroid Imaging Reporting and Data System of the American College of Radiology (10); ATA 2016, the 2016 American Thyroid Association guideline (11); K-TIRADS 2016, the 2016 Thyroid Imaging Reporting and Data System of the Korean Thyroid Association/Korean Society of Thyroid Radiology (5); C-TIRADS 2020, the 2020 Chinese Thyroid Imaging Reporting and Data System (3).