Table 3.

Possibilities of measurement differences within 1 cm, 2 cm, and 3 cm between endoscopic and FDG PET/CT measurements

Comparison group	% within 1 cm (95% CI)	% within 2 cm (95% CI)	% within 3 cm (95% CI)
Reader A exam1 versus endoscopy	62.9% (46.9–78.9%)	77.1% (63.2–91.1%)	88.6% (78.0–99.1%)
Reader A exam2 versus endoscopy	57.1% (40.8–73.5%)	77.1% (63.2–91.1%)	88.6% (78.0–99.1%)
Reader B exam1 versus endoscopy	57.1% (40.8–73.5%)	82.9% (70.4–95.3%)	94.3% (86.6–100.0%)
Reader B exam2 versus endoscopy	54.3% (37.8–70.8%)	80.0% (66.8–93.3%)	91.4% (82.1–100.0%)

Reader A radiation oncologist, Reader B nuclear medicine doctor, CI confidence interval