Interobserver Agreement on Specific Nodal and Extranodal Localizations on I-PET
| Location | Number baseline positive | Number of discrepancies on I-PET | Agreement on negativity (absolute) | Agreement on positivity (absolute) | Percentage OA | Related to baseline prevalence |
| Nodal | ||||||
| Paraaortic* | 414 | 17 | 899 | 14 | 98.2 | 4.1% |
| Cervical*† | 302 | 8 | 915 | 6 | 99.1 | 2.6% |
| Iliac* | 272 | 6 | 917 | 7 | 99.4 | 2.2% |
| Supraclavicular* | 228 | 6 | 920 | 4 | 99.4 | 2.6% |
| Axillary* | 225 | 9 | 920 | 1 | 99.0 | 4.0% |
| Mediastinal† | 212 | 12 | 445 | 6 | 97.4 | 5.7% |
| Inguinal* | 210 | 3 | 926 | 1 | 99.7 | 1.4% |
| Mesenteric | 189 | 16 | 433 | 16 | 96.6 | 8.5% |
| Hilar*† | 147 | 7 | 918 | 3 | 99.2 | 4.8% |
| Spleen† | 115 | 11 | 442 | 6 | 97.6 | 9.6% |
| Other | 105 | 7 | 457 | 1 | 98.5 | 6.7% |
| Waldeyer† | 53 | 8 | 456 | 0 | 98.3 | 15.1% |
| Extranodal | ||||||
| Other extranodal† | 124 | 17 | 436 | 8 | 96.3 | 13.7% |
| Skeletal† | 95 | 12 | 447 | 4 | 97.4 | 12.6% |
| Gastrointestinal† | 61 | 12 | 441 | 7 | 97.4 | 16.7% |
| Lung† | 55 | 3 | 455 | 6 | 99.4 | 5.5% |
| Liver | 37 | 3 | 461 | 1 | 99.4 | 8.1% |
| Pleura | 25 | 1 | 464 | 0 | 99.8 | 4.0% |
| Skin | 11 | 0 | 465 | 0 | 100.0 | 0.0% |
| Central nervous system | 0 | 0 | 465 | 0 | 100.0 | 0.0% |
↵* Right and left are summed and presented together.
↵† Totals not 465 or 930, because of missing values or localization scored as unclear.
Percentage OA = (number of agreement on positivity + number of agreement on negativity)/(number of discrepancies + number of agreement on positivity + number of agreement on negativity) × 100%; related to baseline prevalence = (number of discrepancies/number baseline positive) × 100%.