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Table 1 Comparison of included patients with and without catheter-associated bacteriuria (CA-bacteriuria)

From: A prospective study on the pathogenesis of catheter-associated bacteriuria in critically ill patients

Variables Patients  
CA-bacteriuria
(n = 20; 31.2%)
No CA-bacteriuria
(n = 44; 68.8%)
p. value
Demographics
 Age (years)a 71 ± 12.9 63.7 ± 15.5 0.06
 Male/Female (number) 8/12 37/7 0.001
Medical past history
 Chronic kidney disease (%) 4 (20%) 5 (11.4%) 0.44
 Diabetes mellitus (%) 3 (15%) 4 (9.1%) 0.66
Primary disease
 Acute renal failure (%) 2 (10%) 1 (2.3%) 0.23
 Cardiac arrest (%) 1 (5%) 3 (6.8%) 1.00
 Coma (%) 4 (20%) 7 (15.9%) 0.73
 Postoperative care (%) 1 (5%) 3 (6.8%) 1.00
 Respiratory failure (%) 2 (10%) 1 (2.3%) 0.23
 Sepsis (%) 5 (25%) 17 (38.6%) 0.39
 Shock (%) 4 (20%) 11 (25%) 0.75
 Traumatism (%) 1 (5%) 1 (2.3%) 0.53
ICU Data
 Length of stay (days)a 11.3 ± 10.1 11.3 ± 8.8 0.99
 Admission weight (Kg)a 82.9 ± 25.7 76.4 ± 24.7 0.34
 BMI (kg/m2)a 30.5 ± 9.5 30.6 ± 30.2 0.98
 SAPS II scorea 50.3 ± 29.2 50.3 ± 21.8 0.69
Anti-infective therapyb
 Prior to urinary catheterization (%) 6 (30%) 34 (77.3%) 0.0006
 During patient follow-up (%) 10 (50%) 35 (79.5%) 0.04
 Mean duration (days) ab 6.45 ± 1.72 7.68 ± 1.05 0.55
Complications
 Death (%) 1 (5%) 5 (11.4%) 0.65
 Mechanical ventilation (%) 8 (40%) 22 (50%) 0.59
 Non-invasive ventilation (%) 10 (50%) 27 (61.4%) 0.42
 Vasoactive amine (%) 9 (45%) 16 (36.4%) 0.58
 Acute renal failure (%) 5 (25%) 9 (20.5%) 0.74
 Dialysis (%) 3 (15%) 6 (13.6%) 1.00
Urinary catheterization
 100% silicon catheter (%) 16 (80%) 38 (86.3%) 0.71
 Silicon-coated-latex catheter (%) 4 (20%) 6 (13.7%) 0.71
 Mean duration of catheterization (days) a 6.45 ± 0.94 6.98 ± 0.73 0.89
  1. BMI Body Mass Index, SAPS II simplified acute physiology score II
  2. Statistical significance: P values of < 0.05
  3. aResults expressed as mean ± standard deviation
  4. bNot all patients required anti-infective therapy before catheter insertion or during follow-up. In the CA-bacteriuria group, only four patients had a catheter-associated urinary tract infection with the microorganism responsible for bacteriuria. They were treated accordingly to the identified microorganism. The other anti-infective therapies were secondary to another infection