Table 3.

Explorative binary logistic regression model with backward selection for the global model with patients with S. aureus and/or E. coli infections. Association with the outcome parameter death

Association with the outcome parameter death	Global modeling with both patients with S. aureus and patients with E. coli		Modeling with patients with S. aureus		Modeling with patients with E. coli
	Odds ratio with 0.95 CI	P value	Odds ratio with 0.95 CI	P value	Odds ratio with 0.95 CI	P value
Isolation from biopsies and invasive foreign material	0.52 (0.32, 0.85)	0.009	n.a.	n.a.	0.09 (0.04, 0.29)	<0.001
Isolation from blood cultures	0.71 (0.47, 1.06)	0.091	n.a.	n.a.	0.13 (0.06, 0.29)	<0.001
Isolation from respiratory secretions	n.a.	n.a.	n.a.	n.a.	0.31 (0.09, 1.11)	0.073
Isolation from aspirates	n.a.	n.a.	n.a.	n.a.	0.26 (0.07, 1.00)	0.050
Isolation from abscess materials	2.34 (1.47, 3.72)	<0.001	n.a.	n.a.	n.a.	n.a.
Isolation from urine	n.a.	n.a.	n.a.	n.a.	0.21 (0.08, 0.56)	0.002
Gastroenterology	0.60 (0.36, 1.00)	0.051	n.a.	n.a.	n.a.	n.a.
Cardiovascular disease	n.a.	n.a.	n.a.	n.a.	2.33 (1.00, 5.47)	0.050
Local infection	0.61 (0.40, 0.91)	0.016	n.a.	n.a.	n.a.	n.a.
Rheumatology and neoplasia	0.56 (0.32, 0.97)	0.039	n.a.	n.a.	n.a.	n.a.
Pulmonary disease	n.a.	n.a.	n.a.	n.a.	2.28 (1.04, 4.97)	0.039
Urologic disease	0.04 (0.01, 0.30)	0.002	n.a.	n.a.	0.12 (0.02, 0.90)	0.039
Documented previous antibiotic therapy	1.39 (1.02, 1.89)	0.037	n.a.	n.a.	1.78 (0.99, 3.20)	0.055
Leukocyte count	0.79 (0.62, 1.01)	0.063	n.a.	n.a.	n.a.	n.a.
Age	n.a.	n.a.	n.a.	n.a.	1.03 (1.00, 1.05)	0.019
Superficial infections	n.a.	n.a.	0.27 (0.17, 0.41)	<0.001	n.a.	n.a.
Clindamycin resistance	n.a.	n.a.	1.73 (0.93, 3.22)	0.083	n.a.	n.a.
	N 1883, Pseudo R2 0.0684		N 851, Pseudo R2 0.0604		N 745, Pseudo R2 0.1901

Odds ratios >1 indicate a risk association with the outcome “death,” but odds ratios <1 indicate a protective association.