Table 5. Analysis of mortality for patients with CO poisoning (n = 261).

	Univariate Cox regression analysis			Multivariate Cox regression analysis
	OR	95% CI	P value	OR	95% CI	P value
Arterial ph	250.000	45.455–1000.000	<0.001***	4.785	0.707–32.258	0.109
Hypothermia	19.231	7.463–50.000	<0.001***	1.883	0.586–6.061	0.288
Respiratory failure	142.857	2.532->1000.000	0.016*	>1000.000	0.483->1000.000	0.904
Shock	52.632	17.241–166.667	<0.001***	8.696	2.053–37.370	0.003**
Acute hepatitis	2.976	1.196–7.407	0.019*	1.389	0.497–3.876	0.532
Acute Renal Failure	3.831	1.543–9.524	0.004**	1.017	0.355–2.914	0.975
Coma	23.256	6.803–76.923	P<0.001***	2.564	0.488–13.514	0.266

Note:

*P<0.05,

**P<0.01,

***P<0.001, OR odds ratio, CI confidence interval