Table 3 Results of multivariable logistic regression analysis for the outcome “presence of P. aeruginosa” in clinical sample with Gram negative-pathogen during the first 48 h from admission

male

1.599

1.461–1.75

< 0.0001

Comorbidities

Myocardial infarction

0.806

0.706–0.921

0.0015

Chronic heart failure

0.803

0.678–0.952

0.0114

Chronic pulmonary disease

2.045

1.847–2.263

< 0.0001

Mild liver disease

0.686

0.556–0.847

0.0005

Diabetes with chronic complications

0.716

0.567–0.903

0.0048

Chronic kidney disease

0.905

0.82–0.997

0.044

Metastasized solid tumor

0.847

0.727–0.988

0.034

Infection

1.171

1.049–1.306

0.0048

Pneumonia

1.349

1.203–1.513

< 0.0001

Hemiplegia

2.157

1.897–2.453

< 0.0001

Leukaemia

1.524

1.117–2.079

0.0079

Lymphoma

0.715

0.538–0.95

0.0208

Type of ward

Interdisciplinary

0.742

0.642–0.856

< 0.0001

Neurology / Neurosurgery

1.256

1.049–1.504

0.0129

Internal medicine

1.347

1.191–1.523

< 0.0001

Oncology

1.739

1.446–2.092

< 0.0001

Cardiology Visceral Surgery

0.712

0.598–0.848

0.0001

Cystic fibrosis

26.978

20.481–35.537

< 0.0001

others

1.401

1.256–1.564

< 0.0001

Type of clinical sample

other

1.338

1.106–1.618

0.0027

Respiratory tract

1.534

1.24–1.898

< 0.0001

Blood culture

0.419

0.328–0.534

< 0.0001

Urine

0.525

0.433–0.638

< 0.0001

Infection & MDRGN colonization

Previous invasive P. aeruginosa

7.869

6.601–9.381

< 0.0001

Colonization MDR P. aeruginosa

39.401

28.542–54.391

< 0.0001

Colonization MDR E. coli

0.634

0.471–0.854

0.0027

Colonization MDR Klebsiella spp.

0.33

0.256–0.425

< 0.0001

Colonization MDR Enterobacter spp.

0.537

0.301–0.959

0.0355