Table 6.
Comparison of Positive Predictive Value in Thyroid Nodules with Echogenic foci Types with different TIRADS Category Combination
| Echogenic foci | TIRADS | PPV | TIRADS | PPV | P value |
|---|---|---|---|---|---|
| Type 1 | Web-based TIRADS (≥ 8) | 90.5 | Web-based TIRADS (< 8) | 32.2 | < 0.001 |
| K-TIRADS High Suspicion | 87.8 | K-TIRADSa | 31.4 | < 0.001 | |
| ATA High Suspicion | 87.1 | ATAa | 20.0 | < 0.001 | |
| Russ et al. (≥ 4B) | 78.3 | Russ et al. (< 4B) | 27.8 | < 0.001 | |
| Type 2 | Web-based TIRADS (≥ 8) | 91.9 | Web-based TIRADS (< 8) | 47.1 | < 0.001 |
| K-TIRADS High Suspicion | 85.0 | K-TIRADSa | 57.1 | 0.579 | |
| ATA High Suspicion | 84.8 | ATAa | 33.3 | 0.083 | |
| Russ et al. (≥ 4B) | 83.0 | Russ et al. (<4B) | 42.9 | 0.036 | |
| Type 3 | Web-based TIRADS (≥ 8) | 90.9 | Web-based TIRADS (< 8) | 45.8 | < 0.001 |
| K-TIRADS High Suspicion | 83.8 | K-TIRADSa | 38.6 | < 0.001 | |
| ATA High Suspicion | 84.2 | ATAa | 10.5 | < 0.001 | |
| Russ et al. (≥ 4B) | 73.5 | Russ et al. (<4B) | 37.8 | < 0.001 | |
| Type 4 | Web-based TIRADS (≥ 8) | 50.0 | Web-based TIRADS (< 8) | 40.0 | > 0.999 |
| K-TIRADS High Suspicion | 75.0 | K-TIRADSa | 34.8 | 0.237 | |
| ATA High Suspicion | 75.0 | ATAa | 16.7 | 0.191 | |
| Russ et al. (≥ 4B) | 66.7 | Russ et al. (<4B) | 33.3 | 0.187 | |
| Type 5 | Web-based TIRADS (≥ 8) | 66.7 | Web-based TIRADS (< 8) | 20.0 | 0.120 |
| K-TIRADS High Suspicion | 80.0 | K-TIRADSa | 18.8 | 0.025 | |
| ATA High Suspicion | 80.0 | ATAa | 16.7 | 0.080 | |
| Russ et al. (≥ 4B) | 66.7 | Russ et al. (<4B) | 20.0 | 0.120 | |
| Type 6 | Web-based TIRADS (≥ 8) | 90.5 | Web-based TIRADS (< 8) | 55.0 | 0.015 |
| K-TIRADS High Suspicion | 95.8 | K-TIRADSa | 41.2 | < 0.001 | |
| ATA High Suspicion | 96.0 | ATAa | 33.3 | < 0.001 | |
| Russ et al. (≥ 4B) | 89.3 | Russ et al. (< 4B) | 38.5 | < 0.001 |
TIRADS thyroid image reporting and data system, ATA american thyroid association, PPV positive predictive value
aOther than High suspicion category
TIRADS Thyroid image reporting and data system, ATA American Thyroid Association, PPV Positive Predictive Value
Type 1 = Punctate echogenic foci (≤ 1 mm) with or without posterior shadowing
Type 2 = Punctate echogenic foci with comet-tail artifact
Type 3 = Large echogenic foci (> 1 mm) without shadowing
Type 4 = Macrocalcification (defined as large echogenic foci (> 1 mm) with shadowing
Type 5 = Peripheral curvilinear or eggshell echogenic foci with or without shadowing
Type 6 = Nodules with more than one type of echogenic foci