Table 4 Risk factors associated with false-negative BRAF results
Variable | Odds ratio (95% CI) | P value |
|---|---|---|
Age | 1.053 (1.012–1.099) | 0.012 |
Bethesda system classification | ||
 Nondiagnostic | 32.463 (8.690–140.390) | < 0.001 |
 AUS | 10.598 (2.049–54.824) | 0.004 |
 Suspicious PTC | 3.963 (1.305–12.158) | 0.015 |
 PTC | 1 (reference) |  |
Types of PTC | ||
 Conventional | 1 (reference) |  |
 Follicular variant | 0.218 (0.053–0.712) | 0.019 |
 Tall cell variant | 33.070 (1.679–952.321) | 0.018 |