Female (OR 2.287), leg radiculopathy (OR 3.152), leg weakness (OR 6.375), WBC (OR 1.093), CRP (OR 1.040), identification of causative bacteria (OR 2.077), epidural abscess (OR 2.755), psoas abscess (OR 2.577), and back muscle abscess (OR 2.106) in univariable analysis; leg weakness (OR 7.975) and WBC (OR 1.094) in multivariable analysis; and were statistically significant factors for the below-average 6-month SF-36. This evidence concerns the gene CRP and epidural abscess.