Association of carbon monoxide poisonings and carboxyhemoglobin levels with COVID-19 and clinical severity

Table 5 Spearman’s rho correlation analysis of variables in patient and survival groups

Spearman’s rho	Patients		Survival
	R	P value	R	P value
Age (year)	0.441	< 0.001	0.480	< 0.001
Exposure time (hour)	0.148	< 0.001	0.290	< 0.001
COHb (%)	0.609	< 0.001	0.873	< 0.001
Troponin (ng/mL)	0.608	< 0.001	0.807	< 0.001
Lactate (mmol/L)	0.643	< 0.001	0.880	< 0.001
pH	-0.595	< 0.001	-0.857	< 0.001
PaCO2 (mmHg)	0.571	< 0.001	0.801	< 0.001
PaO2 (mmHg)	-0.495	< 0.001	-0.747	< 0.001
Glucose (mg/dL)	0.467	< 0.001	0.432	< 0.001
Bicarbonate (mmol/L)	-0.536	< 0.001	-0.834	< 0.001
Base excess (mmol/L)	0.541	< 0.001	0.839	< 0.001

COHb: Carboxyhemoglobin; pH: Potential of hydrogen; PaCO₂: Partial pressure of carbon dioxide; PaO₂: Partial arterial oxygen pressure.