Table 4.
Rate of Overall Survival and Probability That Patients Would Remain Free of Thyroid Malignancy up to 15 Years by Diagnostic Category
| Cytologic diagnosis | Patients (n) | Free of thyroid malignancy (%) |
Overall survival (%) |
||||
|---|---|---|---|---|---|---|---|
| 1 Year | 5 Years | 10 Years | 15 Years | Still in study | 15 Years | ||
| Benign | 1575 | 99.1 ± 0.2 | 97.9 ± 0.4 | 97.1 ± 0.4 | 96.6 ± 0.4 | 512 | 1.00 |
| Nondiagnostic | 236 | 94.5 ± 1.5 | 93.2 ± 1.6 | 93.2 ± 1.6 | 93.2 ± 1.6 | 126 | 1.00 |
| AUS/FLUS | 135 | 76.3 ± 3.7 | 76.3 ± 3.7 | 75.6 ± 3.7 | 75.6 ± 3.7 | 38 | 98.5 ± 1.0 |
| AUS | 57 | 66.7 ± 6.2 | 66.7 ± 6.2 | 66.7 ± 6.2 | 66.7 ± 6.2 | 21 | 1.00 |
| FLUS | 78 | 83.3 ± 4.2 | 83.3 ± 4.2 | 83.3 ± 4.2 | 82.1 ± 4.4 | 17 | 97.4 ± 1.8 |
| Follicular neoplasm | 107 | 73.8 ± 4.2 | 71.0 ± 4.4 | 71.0 ± 4.4 | 71.0 ± 4.4 | 34 | 97.3 ± 1.9 |
| SUS | 20 | 30.0 ± 10.2 | 30.0 ± 10.2 | 30.0 ± 10.2 | 30.0 ± 10.2 | 10 | 95.0 ± 4.9 |
| Malignant | 134 | 0.7 ± 0.07 | n/a | n/a | n/a | 41 | 93.1 ± 2.2 |