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Table 1 Baseline characteristics and clinical features of hemodialysis patients with and without infectious spondylitis (model 1)

From: Identifying risk groups of infectious spondylitis in patients with end-stage renal disease under hemodialysis: a propensity score-matched case-control study

Variables Patients with infectious spondylitis (n = 16) Patients without infectious spondylitis (n = 64) p value
Age, mean ± SD, year 60.9 ± 11.9 60.6 ± 11.3 0.93
Male Gender, n (%) 7 (43.8%) 28 (43.8%) 1.00
Diabetes mellitus, n (%) 6 (37.5%) 24 (37.5%) 1.00
Hypertension, n (%) 8 (50%) 46 (71.9%) 0.10
Coronary artery diseases, n (%) 3 (18.8%) 5 (7.8%) 0.19
Heart failure, n (%) 1 (6.3%) 4 (6.3%) 1.00
Cerebral vascular diseases, n (%) 1 (6.3%) 7 (10.9%) 0.58
Liver cirrhosis, n (%) 2 (12.5%) 2 (3.1%) 0.12
Malignancy, n (%) 1 (6.3%) 7 (10.9%) 0.58
Immunosuppression status, n (%) 1 (6.3%) 0 (0%) 0.04
Degenerative spinal disease, n (%) 14 (87.5%) 33 (51.6%) 0.009
History of spinal operation, n (%) 1 (6.3%) 3 (4.7%) 0.80
Primary cause of ESRD    0.18
 Chronic Glomerulonephritis 7 (43.8%) 34 (53.1%)  
 Diabetic nephropathy 6 (37.5%) 24 (37.5%)  
 Polycystic kidney disease 2 (12.5%) 3 (4.7%)  
 Malignant hypertension 1 (6.3%) 0 (0%)  
 Others 0 (0%) 3 (4.7%)  
HD vintage (years) 4.65 ± 4.36 13.44 ± 7.30 <  0.001
HD access
 Arteriovenous fistula 6 (37.5%) 44 (68.8%) 0.021
 Arteriovenous graft 3 (18.8%) 12 (18.8%) 1.00
 Tunneled cuffed catheter 7 (43.8%) 8 (12.5%) < 0.001
Access operation within recent 6 months 10 (62.5%) 8 (12.5%) <  0.001
Laboratory data (blood sample)
 Leukocyte count, 1000/μL 7.53 ± 2.2 6.62 ± 1.7 0.08
 Hemoglobin, g/dL 8.86 ± 1.3 10.2 ± 1.6 <  0.001
 RDW, % 16.3 ± 2.2 14.5 ± 1.4 < 0.001
 Platelet Count, 1000/μL 181 ± 76 192 ± 54 0.48
 BUN, mg/dL 68.2 ± 27.8 67.9 ± 17.3 0.97
 Creatinine, mg/dL 9.10 ± 3.15 10.4 ± 2.3 0.06
 Potassium, mEq/L 4.60 ± 0.74 5.00 ± 0.76 0.06
 Calcium, mg/dL 9.54 ± 1.08 9.76 ± 0.91 0.42
 Inorganic phosphorus, mg/dL 4.98 ± 1.99 5.11 ± 1.49 0.77
 ALT, U/L 18.2 ± 13.2 15.5 ± 8.5 0.32
 ALP, U/L 131.2 ± 84.5 83.4 ± 38.8 0.001
 Albumin, g/dL 3.35 ± 0.65 3.90 ± 0.38 0.001
 Glucose AC, mg/dL 140 ± 91 129 ± 88 0.67
 hsCRP, mg/L 33.1 ± 43.6 12.4 ± 23.9 0.004
 Ferritin, ng/mL 475.7 ± 513.2 335.4 ± 312.7 0.31
  1. ESRD end stage renal disease, HD hemodialysis, RDW red blood cell volume distribution width, ALT alanine transaminase, ALP alkaline phosphatase, BUN blood urea nitrogen, AC ante cibum, hsCRP high sensitivity C- reactive protein
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