Table 4.

Diagnostic accuracy of each test for both assessors independently

	Sens A	Sens B	Spec A	Spec B	Correctly classified A (%)	Correctly classified B (%)	LR+ (A)	LR+ (B)
DD ≥ 2	0.97 (0.83–1.00)	1.0 (0.88–1.00)	0.20 (0.08–0.39)	0.00 (0.00–0.12)	58	50	1.2 (1.0–1.4)	1.0 (1.0–1.0)
DD ≥ 3	0.90 (0.73–0.98)	0.93 (0.78–0.99)	0.37 (0.20–0.56)	0.27 (0.12–0.46)	63	60	1.4 (1.1–1.9)	1.3 (1.0–1.6)
DD ≥ 4	0.73 (0.54–0.88)	0.67 (0.47–0.83)	0.80 (0.61–0.92)	0.77 (0.58–0.90)	77	72	3.7 (1.7–7.7)	2.9 (1.4–5.7)
DD ≥ 5	0.07 (0.00–0.22)	0.03 (0.00–0.17)	1.0	1.0 (0.88–1.0)	53	52	∞	∞
HIZ	0.23 (0.10–0.42)	0.53 (0.34–0.72)	0.77 (0.58–0.90)	0.80 (0.61–0.92)	50	67	1.0 (0.40–0.25)	2.7 (1.2–5.9)
Modic type 1	0.10 (0.02–0.27)	0.27 (0.12–0.46)	1.0 (0.88–1.00)	0.97 (0.83–1.00)	55	62	∞	8.0 (1.1–60.1)
Modic any	0.30 (0.15–0.49)	0.43 (0.25–0.63)	0.93 (0.78–0.99)	0.93 (0.78–0.99)	62	68	4.50 (1.1–19.1)	6.5 (1.6–26.4)
Annular tear	0.43 (0.25–0.63)	0.73 (0.54–0.88)	0.87 (0.69–0.96)	0.37 (0.20–0.56)	65	58	3.3 (1.2–8.8)	1.2 (0.8–1.6)
Herniation	0.73 (0.54–0.88)	0.77 (0.58–0.90)	0.60 (0.41–0.77)	0.63 (0.44–0.80)	67	70	1.8 (1.1–3.0)	2.1 (1.3–3.5)

DD ≥ 2, disc degeneration score ≥2 at any single level

A reviewer A, B reviewer B, HIZ high-intensity zone