Measuring distance from the incisors to the esophageal cancer by FDG PET/CT: endoscopy as the reference

BMC Gastroenterology

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 endoscopy^a	1.277 cm (1.16; 0.00–5.00)	0.965
Reader A exam2 versus endoscopy^a	1.289 cm (1.19; 0.00–4.90)	0.962
Reader B exam1 versus endoscopy^a	1.174 cm (0.98; 0.00–4.70)	0.971
Reader B exam2 versus endoscopy^a	1.129 cm (1.06; 0.00–4.10)	0.970
Reader A exam1 versus Reader A exam2^a	0.663 cm (0.90; 0.00–4.60)	0.985
Reader B exam1 versus Reader B exam2^a	0.497 cm (0.30; 0.00–1.00)	0.996
Reader A exam1 versus Reader B exam1^a	0.897 cm (0.72; 0.00–2.70)	0.984
Reader A exam2 versus Reader B exam2^a	0.954 cm (0.97; 0.00–4.90)	0.976
Reader A exam1 versus Reader B exam2^a	0.994 cm (0.80; 0.00–3.30)	0.980
Reader A exam2 versus Reader B exam1^a	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

ISSN: 1471-230X