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Table 2: Classification of each spinal level as normal, mild, moderate, and severe stenosis on the evaluation cohort (n = 130) using decision trees trained on the development cohort (n = 130)
Metric Accuracy AUROC Cohen κ
Accuracy 95% CI AUROC 95% CI κ 95% CI
DSCA 64.9 (60.9–69.0) 76.6 (73.9–79.3) 0.62 (0.57–0.66)
DSDIA 71.4 (67.1–75.7) 80.9 (78.0–83.8) 0.69 (0.64–0.75)
DDRDIA 76.5 (72.6–80.4)^{^a} 84.3^{^a} (81.7–86.9)^{^a} 0.75^{^a} (0.71–0.79)^{^a}
DDRCA 78.9 (75.0–82.9)^{^a} 86.0^{^a} (83.3–88.5)^{^a} 0.80^{^a} (0.75–0.83)^{^a}
↵a Ratio-based metrics with higher κ scores (P < .001).

Metric	Accuracy		AUROC		Cohen κ
Metric	Accuracy	95% CI	AUROC	95% CI	κ	95% CI
DSCA	64.9	(60.9–69.0)	76.6	(73.9–79.3)	0.62	(0.57–0.66)
DSDIA	71.4	(67.1–75.7)	80.9	(78.0–83.8)	0.69	(0.64–0.75)
DDRDIA	76.5	(72.6–80.4)^{^a}	84.3^{^a}	(81.7–86.9)^{^a}	0.75^{^a}	(0.71–0.79)^{^a}
DDRCA	78.9	(75.0–82.9)^{^a}	86.0^{^a}	(83.3–88.5)^{^a}	0.80^{^a}	(0.75–0.83)^{^a}