Table 1 Demographic data and findings of examination
Demographic data | Â |
 Number of patients (M:F) | 41 (11:30) |
 Age (years) | 43.5 (28.0–60.5) |
Pain at anterior–posterior bending of the trunk (n = 41) |  |
 Anterior bending | 25 |
 Posterior bending | 6 |
 Both of anterior and posterior bending | 5 |
 None | 5 |
MRI findings | Â |
 Disc herniation | 17 |
 High intensity zone | 17 |
 Degenerative spondylolisthesis | 1 |
 Spondylolytic spondylolisthesis | 1 |