ROC Analysis for Detection of Nodal Metastases by CECT, WB PET/CT, and HN PET/CT Protocols
| Parameter | By level | By patient |
|---|---|---|
| Area under the curve | ||
| CECT | 0.722 | 0.863 |
| WB protocol | 0.790 | 0.850 |
| HN protocol | 0.896 | 0.936 |
| 95% confidence interval | ||
| CECT | 0.623–0.820 | 0.741–0.984 |
| WB protocol | 0.699–0.881 | 0.730–0.970 |
| HN protocol | 0.836–0.956 | 0.860–1.000 |
| Comparison of CT vs. WB PET/CT | ||
| Difference between areas | 0.069 | 0.0125 |
| Significance level | P = 0.099 | P = 0.0811 |
| Comparison of CT vs. HN PET/CT | ||
| Difference between areas | 0.174 | 0.074 |
| Significance level | P < 0.001 | P = 0.152 |
| Comparison of WB vs HN PET/CT | ||
| Difference between areas | 0.106 | 0.086 |
| Significance level | P < 0.002 | P = 0.059 |