Table 1:

Classification of each spinal level as normal versus stenosed on the evaluation cohort (n = 130) using each quantitative metric^{^a}

Metrics Compared	AUROC: Group 1	AUROC: Group 2	Z-Statistic	Significance
DSCA vs DSDIA	96.5 (95.0–97.7)	96.6 (95.1–97.8)	0.19	P = .85
DSCA vs DDRDIA	96.5 (95.0–97.7)	98.0 (96.7–98.9)^{^b}	2.24^{^b}	P = .02^{^b}
DSCA vs DDRCA	96.5 (95.0–97.7)	98.6 (97.4–99.3)^{^b}	3.54^{^b}	P = .004^{^b}
DSDIA vs DDRDIA	96.6 (95.1–97.8)	98.0 (96.7–98.9)^{^b}	2.56^{^b}	P = .01^{^b}
DSDIA vs DDRCA	96.6 (95.1–97.8)	98.6 (97.4–99.3)^{^b}	2.89^{^b}	P = .004^{^b}
DDRDIA vs DDRCA	98.0 (96.7–98.9)	98.6 (97.4–99.3)	1.57	P = .12

↵a Reported are pair-wise comparisons between the quantitative metrics using the DeLong paired test for AUROCs. Data in parentheses represent 95% confidence intervals.
↵b Difference in AUROC is statistically significant (P < .05).