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Table 1: Demographic characteristics of patient cohort
Variable No (%)
Age (mean) (yr) 63 ± 16
Sex (M/F) 41:31
Immunosuppression 33 (46)
 Cancer 8 (11)
 COPD 6 (8)
 Cirrhosis 3 (4)
 Diabetes 15 (21)
 HIV 4 (6)
Steroid use 12 (17)
IV drug abuse 9 (13)
Postoperative status (within 1 wk)
 Symptoms relevant to discitis 0 (0)
 Back pain 72 (100)
 Febrile 25 (35)
 Radiation 12 (17)
 Numbness/weakness 10 (14)
 Bowel or bladder incontinence 3 (4)
Time to diagnosis (days)^{^a} 55 (1–270)
Site of involvement 
 Cervical 3 (4)
 Thoracic 20 (28)
 Lumbar 49 (68)
Biopsy technique 
 CT 50 (69)
 Fluoroscopy 22 (31)
Either surgical pathology (+)/microbiology (+) 29 (40)
 Surgical pathology (+) 24 (33)
 Microbiology growth from tissue (+) 12 (17)
 Both 7 (10)
Bacterial isolates from tissue culture 12
 Staphylococci 5 (42)
 Streptococci 3 (25)
 Pseudomonas 2 (17)
 Klebsiella 1 (8)
 Mycobacteria 1 (8)
Blood culture growth (+) 2 (3)
Laboratory leukocyte count (cells/mm³)^{^a} 8.0 (4.1–17.5)
CRP (mg/L)^{^a} 46.4 (1–303)
ESR (mm/h)^{^a} 59.3 (6–156)
Note:—COPD indicates chronic obstructive pulmonary disease.
↵a Mean followed by range in parenthesis.