Table. 4—

4 Logistic regression model used to build the risk chart

Variables	Admission			After 2 h
Variables	OR	p-value	95% CI	OR	p-value	95% CI
APACHE II score ≥29	3.30	0.0001	1.81–6.01	4.79	0.0001	2.20–10.44
GCS 12–14	2.29	0.0008	1.41–3.72	1.93	0.0493	1.00–3.72
GCS ≤11	4.40	<0.0001	2.59–7.49	5.16	<0.0001	2.54–10.50
pH <7.25	1.97	0.0046	1.23–3.15	21.02	<0.0001	10.07–43.87
pH 7.25–7.29	1.08	0.7511	0.68–1.72	2.92	0.0004	1.62–5.28
RR 30–34	1.83	0.0086	1.17–2.88	2.67	0.0021	1.43–4.99
RR ≥35	2.66	<0.0001	1.66–4.25	4.95	<0.0001	2.64–9.29

OR: odds ratio; CI: confidence intervals; APACHE: acute physiology and chronic health evaluation; GCS: Glasgow Coma Scale; RR: respiratory rate.