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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