Table 2 Clinical characteristics of patients and laboratory findings
|  | Culture positive(n = 148) | Culture negative (n = 65) | P value |
|---|---|---|---|
Age, median (IQR), years | 75 (64–84) | 62.5 (56.75–74) |  < 0.0001a |
Gender, n (%) | |||
 Male | 75 (50.68) | 42 (64.62) | 0.0597b |
 Female | 73 (49.32) | 23 (35.38) | 0.0597b |
Comorbidities, n (%) | |||
 Diabetes | 4 (2.70) | 4 (6.15) | 0.2225b |
 Pulmonary disease | 18 (12.16) | 4 (6.15) | 0.1846b |
 Cardiovascular disease | 5 (3.38) | 3 (4.62) | 0.6619b |
 Cerebrovascular disease | 9 (6.08) | 3 (4.62) | 0.6692b |
 Malignancy | 27 (18.24) | 12 (18.46) | 0.9697b |
 Chronic renal disease | 9 (6.08) | 15 (23.08) | 0.0003b |
 Chronic liver disease | 10 (6.76) | 3 (4.62) | 0.5477b |
 Haematological disease | 4 (2.70) | 2 (3.08) | 0.8792b |
 Hospital, median (IQR), days | 25.50 (15–63.5) | 12.50 (7.75–25) |  < 0.0001a |
 Catheterized, n (%) | 106 (71.62) | 29 (44.62) | 0.0002b |
 WBC count, (RR, 0–30), /μL | 143.80 (1.3–32,444.8) | 12.60 (1–4544.9) |  < 0.0001a |
 Unknown | 34 (22.97) | 1 (1.54) |  < 0.0001c |
 0–30 | 22 (14.87) | 42 (64.61) | |
  > 30 | 92 (62.16) | 22 (33.85) | |
PON, (RR, 40–75) | 76.75 (1.1–95.3) | 71.10 (30.9–95.8) | 0.0944a |
 Unknown | 38 (25.67) | 2 (3.08) |  < 0.0500c |
  < 40% | 3 (2.03) | 1 (1.54) | |
 40–75% | 49 (33.11) | 40 (61.54) | |
  > 75% | 58 (39.19) | 22 (33.84) | |
CRP, (RR, < 10), mg/L | 18.05 (0.04–232.8) | 23.20 (0.5–275.9) | 0.2971a |
 Unknown | 43 (29.05) | 4 (6.15) |  > 0.0500c |
  < 10 | 42 (28.38) | 24 (36.92) | |
 10–50 | 31 (20.95) | 14 (21.54) | |
  > 50 | 32 (21.62) | 23 (35.39) | |
PCT, (RR, < 0.05), ng/mL | 0.2170 (0.02–14.95) | 0.2000 (0.02–17.11) | 0.4738a |
 Unknown | 64 (43.24) | 38 (58.46) |  > 0.0500c |
  < 0.05 | 11 (7.43) | 4 (6.15) | |
  > 0.05 | 73 (49.33) | 23 (35.39) | |