Table 3. Analysis of influencing factors for risk stratification of acute pulmonary embolism.

Parameter	B	S.E.	Wald	OR	95% CI	P
Age	0.002	0.048	0.002	1.002	0.912–1.102	0.96
Cancer	−1.153	1.595	0.523	0.316	0.014–7.185	0.47
Dyspnea	−0.285	1.460	0.038	0.752	0.043–13.147	0.85
Syncope	1.235	1.155	1.143	3.440	0.357–33.102	0.29
P/F ratio	−0.034	0.014	6.120	0.967	0.941–0.993	0.01
PaCO2	0.008	0.063	0.018	1.009	0.892–1.140	0.89
SpO2/FiO2	−0.014	0.009	2.733	0.986	0.969–1.003	0.10

CI, confidence interval; OR, odds ratio; P/F, partial oxygen pressure/fraction of inspired oxygen; PaCO₂, partial pressure of carbon dioxide; SpO₂/FiO₂, pulse oxygen saturation/fraction of inspired oxygen.