Value of arterial blood gas analysis in patients with acute dyspnea: an observational study

Table 2 Prognostic value of ABGA parameters to predict short-term and long-term outcome

ICU admission	OR	95% CI	AUC	95% CI	P-value
pH	0.552	0.43-0.71	0.647	0.61-0.69	< 0.001
PaCO₂	1.309	1.15-1.50	0.591	0.55-0.63	0.001
PaO₂	1.029	0.98-1.08	0.476	0.43-0.52	0.257
HCO₃	1.00	0.96-1.05	0.504	0.46-0.55	0.956
Base excess	0.954	0.91-1.00	0.541	0.50-0.58	0.041
In-hospital mortality	OR	95% CI	AUC	95% CI	P -value
pH	0.645	0.49-0.85	0.647	0.61-0.69	0.022
PaCO₂	1.142	0.96-1.35	0.526	0.48-0.57	0.125
PaO₂	1.050	1.00-1.11	0.576	0.53-0.62	0.133
HCO₃	0.960	0.90-1.02	0.528	0.49-0.57	0.191
Base excess	0.943	0.89-1.00	0.546	0.50-0.59	0.045
30 days mortality	OR	95% CI	AUC	95% CI	P -value
pH	0.602	0.46-0.79	0.650	0.61-0.69	< 0.001
PaCO₂	1.205	1.04-1.40	0.562	0.52-0.61	0.015
PaO₂	1.025	0.97-1.09	0.486	0.44-0.53	0.409
HCO₃	0.977	0.92-1.03	0.504	0.46-0.55	0.416
Base excess	0.950	0.90-1.00	0.518	0.47-0.56	0.067
12-month mortality	OR	95% CI	AUC	95% CI	P -value
pH	0.767	0.62-0.94	0.584	0.54-0.63	0.011
PaCO₂	1.160	1.03-1.30	0.577	0.53-0.62	0.012
PaO₂	1.040	1.00-1.09	0.518	0.47-0.56	0.071
HCO₃	1.021	0.98-1.06	0.544	0.50-0.59	0.298
Base excess	1.022	0.98-1.06	0.559	0.52-0.60	0.296
pH	OR	95% CI	AUC	95% CI	P -value
ICU admission	0.533	0.41-0.69	0.661	0.62-0.70	< 0.001
In-hospital mortality	0.621	0.44-0.88	0.662	0.61-0.71	0.007
30-day mortality	0.602	0.46-0.79	0.650	0.61-0.69	< 0.001
12-month mortality	0.767	0.62-0.94	0.584	0.54-0.63	0.011

Univariable logistic regression analysis of arterial blood gas analysis (ABGA) parameters to predict ICU admission, in-hospital mortality, 30-day mortality, and 12-month mortality. Multivariable logistic regression analysis of significant parameters from univariable analysis shows pH as independent predictor. Odds ratios (OR) with 95% confidence interval (95% CI) for ABGA parameters; OR are given for any increase of 1 kPa for partial pressure of arterial carbon dioxide (PaCO₂), and partial pressure of arterial oxygen (PaO₂), partial pressure of bicarbonate (HCO₃), base excess and 0.1 for pH. Area under the curve (AUC) quantifying the diagnostic accuracy of the individual ABGA variables.

ISSN: 1364-8535