Nomogram for the prediction of postoperative hypoxemia in patients with acute aortic dissection

BMC Anesthesiology

Table 2 Logistic regression model for the prediction of postoperative hypoxemia

Variables	Odds ratio	Lower limit of 95% CI	Upper limit of 95% CI	P value
BMI	1.32	1.15	1.54	< 0.001
PF	0.99	0.99	1.00	0.011
Stanford (A as reference)	0.22	0.06	0.66	0.011
WBC	1.21	1.06	1.40	0.008
Age	1.03	0.99	1.08	0.128
HCT	0.89	0.80	0.98	0.016
CBP time	0.99	0.98	1.00	0.031
pH	0.0002	2*10⁻⁸	0.74	0.048

Note: The logistic regression model was selected by using stepwise forward selection procedure, AIC was used to decide the inclusion of a variable. The odds ratio was reported for each one unit increase for each variable
Abbreviations: CI confidence interval, WBC white blood cell count, PF PaO2/FiO2, BMI body mass index, CBP cardiopulmonary bypass, HCT hematocrit

ISSN: 1471-2253