CRP and epidural abscess: Risk factors for SND were epidural abscess [adjusted odds ratio, aOR 8.9 (3.8–21)], cervical [aOR 8.2 (2.8–24)], and/or thoracic involvement [aOR 14.8 (5.6–39)], Staphylococcus aureus PVO [aOR 2.5 (1.1–5.3)], and C-reactive protein (CRP) >150 mg/L [aOR 4.1 (1.9–9)].