Performance of the CORB (Confusion, Oxygenation, Respiratory Rate, and Blood Pressure) Scale for the Prediction of Clinical Outcomes in Pneumonia

Table 2

Association of the CORB, CURB-65, and SpO₂/FiO₂ variables with each outcome.

Outcome	OR	CI 95% (inf-sup)	value
In-hospital mortality
CURB-65 ≥ 2	4,9	3.707–6.364	<0.001
CORB ≥2	3,4	2.632–4.484	<0.001
CORB ≥2 (SpO2/FiO2 <300)	4,9	3.629–6.52	<0.001
30-day mortality
CURB-65 ≥ 2	1,4	1.266–1.46	<0.001
CORB ≥2	1,3	1.185–1.342	<0.001
CORB ≥2 (SpO2/FiO2 <300)	1,5	1.316–1.602	<0.001
IMV requirement
CURB-65 ≥ 2	2,0	1.417–2.814	<0.001
CORB ≥2	2,7	1.92–3.726	<0.001
CORB ≥2 (SpO2/FiO2 <300)	5,0	3.557–7.133	<0.001
Vasopressor requirement
CURB-65 ≥ 2	2,2	1.601–3.066	<0.001
CORB ≥2	2,8	2.013–3.792	<0.001
CORB ≥2 (SpO2/FiO2 <300)	4,3	3.064–6.017	<0.001
Composite outcome (in-hospital mortality/IMV requirement/vasopressor requirement)
CURB-65 ≥ 2	3,9	3.103–5.008	<0.001
CORB ≥2	3,2	2.540–4.059	<0.001
CORB ≥2 (SpO2/FiO2 <300)	6,0	4.564–7.900	<0.001

OR: odds ratio. CI: confidence interval. IMV: invasive mechanical ventilation. SpO₂/FiO₂: oxygen saturation by pulse oximetry/fraction of inspired oxygen ratio. CURB-65: confusion, urea nitrogen >7 mmol/L (19 mg/dL), respiratory rate ≥30/min, systolic blood pressure <90 mmHg or diastolic blood pressure ≤60 mmHg, and age ≥65 years. CORB: confusion (new onset or deterioration of preexisting condition), oxygen saturation ≤90%, respiratory rate ≥30/min, and systolic blood pressure <90 mmHg or diastolic blood pressure ≤60 mmHg. Hosmer–Lemeshow test: 0,598; 0,238; 0,498; 0,247; 0,328.