Table 3.

Number of the discs with positive MRI findings at each intervertebral level

	Herniation group (n = 51)	Control (n = 113)	p value
Decrease in signal intensity	48 (94.1)	93 (82.3)	0.033*
Posterior disc protrusion	47 (92.2)	90 (79.6)	0.034*
Disc space narrowing	9 (17.6)	33 (29.2)	0.082

Parentheses indicate percentage

* Statistical significance