Table 1

Interobserver agreement (kappa statistics) for a diagnosis of high grade dysplasia, intramucosal adenocarcinoma, and submucosal adenocarcinoma—first histological assessment (n=75)

Observers	Overall kappa	Individual kappa	95% CI	Interpretation
GI-1/GI-2, gastrointestinal pathologists 1 and 2; GSP, general surgical pathologist; HGD, high grade dysplasia; IMC, intramucosal adenocarcinoma; SMC, submucosal adenocarcinoma; Kappa, kappa coefficient; 95% CI, confidence interval.
All observers	0.59		0.49–0.68	Moderate
HGD		0.48	0.35–0.61	Moderate
IMC		0.50	0.37–0.63	Moderate
SMC		0.76	0.63–0.89	Good
GI-1/GI-2	0.68		0.51–0.85	Good
GI-1/GSP	0.59		0.42–0.76	Moderate
GI-2/GSP	0.49		0.32–0.65	Moderate