Infections of respiratory or abdominal origin in ICU patients: what are the differences?

Table 4 Multiple logistic regression analysis in patients with abdominal infections. The development of secondary infection was the dependent variable

	Estimated coefficient	SD	Odds ratio (95% CI)	P-value
SAPS II score, per point	0.016	0.006	1.016 (1.005 to 1.028)	0.005
ICU length of stay, per day	0.055	0.011	1.057 (1.034 to 1.079)	< 0.001
Abdominal/respiratory variable
Respiratory infection	Reference
Abdominal infection	-0.076	0.316	0.927 (0.499 to 1.721)	0.810
Abdominal/respiratory infection by ICU LOS	0.069	0.027	1.071 (1.016 to 1.129)	0.011

CI: confidence interval; SD: standard error of the estimate; Hosmer and Lemeshow Chi square 7.636, P = 0.470. The percentage of correct classifications is 71.4.

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