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Table 1 Results of unadjusted conditional logistic regression modeling of the possible risk factors for CRAB acquisition by cases and controls in the neurosurgical intensive care unit (NSICU)

From: Faucet aerators as a reservoir for Carbapenem-resistant Acinetobacter baumannii: a healthcare-associated infection outbreak in a neurosurgical intensive care unit

Possible risk factor

Case patients

(n = 6)

Control patients

(N = 12)

Univariate OR

(95% CI)a

P

Blood transfusion or the use of blood products

2 (33.33%)

5 (41.67%)

0.70 (0.09–5.43)

1.000

Urinary catheterization

6 (100.00%)

12 (100.00%)

…

…

Hemodialysis

0 (0.00%)

0 (0.00%)

…

…

Venous catheterization

6 (100.00%)

6 (50.00%)

…

0.054

Mechanical ventilation

5 (83.33%)

8 (66.67%)

2.50 (0.21–29.26)

0.615

Tracheotomy

5 (83.33%)

6 (50.00%)

5.00 (0.44–56.62)

0.316

Hypertension b

5 (83.33%)

5 (41.67%)

7.00 (0.61–79.87)

0.152

Diabetes

0 (0.0%)

1 (8.33%)

…

1.000

Chronic obstructive pulmonary disease

1 (16.67%)

0 (0.00%)

…

0.333

Tumor

0 (0.00%)

0 (0.00%)

…

…

Surgery

4 (66.67%)

4 (33.33%)

0.25 (0.03–2.00)

0.191

Medical group

3 (50.00%)

7 (58.33%)

0.71 (0.10–5.12)

0.738

  1. NOTE. Data are no. (%) of objects. CI: confidence interval; OR: odds ratio
  2. a ORs and 95% CIs for partial factors cannot be estimated, because the rate of these variables in the case or control was 0 or 100%
  3. b Hypertensive patients were defined as those who had a systolic blood pressure ≥ 140 mmHg and/or diastolic blood pressure ≥ 90 mmHg [21]