Table 2.
Reproducibility of FDG-PET measurements and agreement between endoscopic and FDG PET/CT measurements
| Comparison group | Mean absolute difference | ICC |
|---|---|---|
| Reader A exam1 versus endoscopya | 1.277 cm (1.16; 0.00–5.00) | 0.965 |
| Reader A exam2 versus endoscopya | 1.289 cm (1.19; 0.00–4.90) | 0.962 |
| Reader B exam1 versus endoscopya | 1.174 cm (0.98; 0.00–4.70) | 0.971 |
| Reader B exam2 versus endoscopya | 1.129 cm (1.06; 0.00–4.10) | 0.970 |
| Reader A exam1 versus Reader A exam2a | 0.663 cm (0.90; 0.00–4.60) | 0.985 |
| Reader B exam1 versus Reader B exam2a | 0.497 cm (0.30; 0.00–1.00) | 0.996 |
| Reader A exam1 versus Reader B exam1a | 0.897 cm (0.72; 0.00–2.70) | 0.984 |
| Reader A exam2 versus Reader B exam2a | 0.954 cm (0.97; 0.00–4.90) | 0.976 |
| Reader A exam1 versus Reader B exam2a | 0.994 cm (0.80; 0.00–3.30) | 0.980 |
| Reader A exam2 versus Reader B exam1a | 0.834 cm (0.77; 0.10–4.60) | 0.983 |
Reader A radiation oncologist, Reader B nuclear medicine doctor, ICC intraclass correlation coefficient
aNumbers in parentheses are standard deviation and ranges