Table 3. Sensitivities and specificities of magnetic resonance imaging findings for the diagnosis of discogenic back pain.

	Discography		Sensitivity % (95% CI)	Specificity % (95% CI)
Positive results	Positive	Negative
Black disc as only finding	2 (15%)	11 (84%)	14 (1.78–42.8)	35.29 (14.2–61.6)
Bulging	6 (67%)	3 (33%)	43 (17.6–71.1)	82 (56.5–96.2)
Hernia	3 (75%)	1 (25%)	21 (4.6–50.8)	94 (71.3–99.8)
HIZ	4 (80%)	1 (20%)	28 (8.39–58.1)	94 (71.3–99.8)
Modic	3 (75%)	1 (25%)	21.4 (4.6–50.8)	94 (71.3–99.8)