Table 4. Inter-Observer Agreement between Two Reviewers on the Initial Staging, Resectability Assessment, and Follow-Up after Surgical Resection.

	CT	CT + PET/MRI
Initial workup
Likelihood of malignancy	0.55 (0.36–0.74)	0.49 (0.24–0.73)
Local resectability	0.45 (0.30–0.60)	0.55 (0.40–0.70)
Distant lymph node metastasis	0.44 (0.27–0.61)	0.75 (0.64–0.87)
Hepatic metastasis	0.51 (0.31–0.72)	0.60 (0.45–0.75)
Peritoneal seeding	0.61 (0.39–0.82)	0.76 (0.55–0.97)
Overall resectability	0.57 (0.42–0.71)	0.83 (0.72–0.94)
Follow-up after surgical resection
Local recurrence	0.72 (0.53–0.91)	0.85 (0.75–0.96)
Distant lymph node metastasis	0.82 (0.65–0.98)	0.90 (0.79–1.00)
Hepatic metastasis	0.74 (0.58–0.90)	0.79 (0.61–0.96)
Peritoneal seeding	0.83 (0.66–1.00)	0.75 (0.51–0.99)

Data are shown as linear-weighted kappa values. The numbers in parentheses are 95% confidence intervals.