. 2019 Oct 16;9(4):124–130. doi: 10.1556/1886.2019.00021

Table 5.

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 infectious disease as main diagnosis

Association with the outcome parameter infectious disease as main diagnosis	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
Biopsies and invasive foreign material	n.a.	n.a.	n.a.	n.a.	4.26 (1.78, 10.19)	0.001
Blood cultures	5.53 (4.15, 7.38)	<0.001	n.a.	n.a.	5.69 (2.78, 11.68)	<0.001
Bronchial lavage	n.a.	n.a.	0.23 (0.05, 1.07)	0.061	n.a.	n.a.
Respiratory secretions	n.a.	n.a.	0.20 (0.11, 0.37)	<0.001	n.a.	n.a.
Aspirates	5.40 (2.92, 10.01)	<0.001	n.a.	n.a.	14.19 (5.24, 38.40)	<0.001
Abscess materials	5.52 (3.61, 8.46)	<0.001	4.88 (2.58, 9.25)	<0.001	n.a.	n.a.
Wound swabs	8.08 (6.06, 10.77)	<0.001	1.83 (1.33, 2.51)	<0.001	651.55 (157.87, 2689.04)	<0.001
Urine	n.a.	n.a.	0.13 (0.03, 0.60)	0.008	18.99 (6.41, 56.22)	<0.001
Age	0.99 (0.98, 0.99)	<0.001	0.99 (0.98, 0.99)	0.001	1.01 (1.00, 1.03)	0.083
Gender	1.25 (1.00, 1.54)	0.045	n.a.	n.a.	n.a.	n.a.
Leukocyte count	1.47 (1.22, 1.75)	<0.001	1.35 (1.06, 1.73)	0.016	1.71 (1.22, 2.41)	0.002
CRP	n.a.	n.a.	0.86 (0.74, 0.99)	0.034	1.43 (1.12, 1.81)	0.004
Superficial infections	n.a.	n.a.	1.42 (1.08, 1.87)	0.013	0.04 (0.02, 0.08)	<0.001
Surgical and intensive care wards	n.a.	n.a.	n.a.	n.a.	0.18 (0.11, 0.30)	<0.001
Surgical and intensive care wards	N 1885, Pseudo R² 0.1385		N 986, Pseudo R² 0.1292		N 899, Pseudo R² 0.3473,

Odds ratios >1 indicate a risk association with the outcome infectious disease as main diagnosis, whereas odds ratios <1 indicate a protective association.