Table 2.

Intra-class coefficient with 95% confidence intervals for experts and novices.

Histology group	Contrast	Rater	Preoperative	Postoperative	Progression
GB	Enhancing	Experts	0.99 (0.98–1.00)	0.92 (0.85–0.97)	0.91 (0.82–0.96)
GB	Enhancing	Novices	0.98 (0.96–1.00)	0.60 (0.39–0.78)	0.97 (0.95–0.99)
GB	Non-enhancing	Experts	0.61 (0.41–0.79)	0.25 (0.05–0.52)	0.53 (0.24–0.76)
GB	Non-enhancing	Novices	0.55 (0.24–0.78)	0.15 (0.00–0.38)	0.40 (0.09–0.67)
Non-GB	Enhancing	Experts	0.28 (0.07–0.55)	⁎	1.00 (1.00–1.00)
Non-GB	Enhancing	Novices	0.57 (0.35–0.77)	⁎	0.66 (0.47–0.83)
Non-GB	Non-enhancing	Experts	0.92 (0.81–0.97)	0.84 (0.70–0.93)	0.80 (0.65–0.91)
Non-GB	Non-enhancing	Novices	0.73 (0.40–0.89)	0.55 (0.32–0.76)	0.73 (0.46–0.88)

GB: glioblastoma.

^⁎No enhancing elements were identified for non-glioblastomas in the postoperative MRI, with the exception of 2 disjoint residual volumes each by a different rater.