Length of stay, duration of mechanical ventilation, mortality, and acute kidney injury in acute respiratory failure requiring endotracheal intubation

Table 6 Variables that were independent predictors of mortality after binary logistic regression analysis

Variable	Regression coefficient	SE	P value	Odds ratio	95%CI
Age	0.039	0.023	0.089	1.039	0.994-1.087
Comorbidities	-3.271	1.092	0.003	0.038	0.004-0.323
APACHE score	0.222	0.057	< 0.001	1.248	1.116-1.395
Medical admission	1.634	0.889	0.066	5.125	0.897-29.272
COVID-19	-1.965	0.936	0.036	0.140	0.022-0.879
PaO2/FiO2	0.007	0.007	0.370	1.007	0.992-1.021
PaO2	-0.024	0.013	0.071	0.977	0.952-1.002
PaCO2	0.087	0.040	0.030	1.091	1.009-1.181
pH	-0.915	4.229	0.829	0.401	0.000-1592.550
Ppeak	0.150	0.060	0.013	1.162	1.033-1.308
PEEP	0.260	0.134	0.053	1.296	0.997-1.686
RR	0.395	0.172	0.022	1.484	1.033-1.308
MV	-0.001	0.000	0.017	0.999	0.999-1.000

SE: Standard error; CI: Confidence interval; APACHE: Acute physiology and chronic health evaluation; COVID-19: Coronavirus disease 2019; PaO₂: Arterial oxygen partial pressure; FiO₂: Fraction of inspired oxygen; PaCO₂: Arterial carbon dioxide partial pressure; Ppeak: Peak airway pressure; PEEP: Positive end-expiratory pressure; RR: Respiratory rate, MV: Minute ventilation.