Table 4.

Multivariate Logistic Regression Analysis of the 28-Day All-Cause Mortality Rate in ICU Patients with AECOPD(RHR as a Continuous Variable)

	Model 1	OR	Model 2	OR	Model 3	OR	Mode 4	OR	Model 5	OR
Before PSM	<0.001	12.603(3.679~43.172)	<0.001	15.648(4.326~56.604)	0.001	9.934(2.591~38.080)	<0.001	17.830(4.359~72.927)	0.002	11.152(2.386~52.130)
PSM	<0.001	52.959(6.690~419.222)	<0.001	67.585(7.646~597.413)	<0.001	65.992(6.427~677.622)	0.002	37.717(3.584~369.107)	0.001	61.515(5.034~751.686)

Notes: Model 1 was not adjusted for any variables. Model 2 was adjusted for gender, age, and ethnicity. Model 3 was adjusted for hypertension, diabetes, asthma, pulmonary embolism, anemia, hematologic malignancy, connective tissue disease, myocardial infarction, peripheral vascular disease, liver disease, chronic kidney disease, malignancy, and sepsis. Model 4 was adjusted for heart rate, respiratory rate, systolic blood pressure, diastolic blood pressure, SpO2, white blood cell, platelet, potassium, sodium, glucose, creatinine, pH, PaCO2, anion gap, and bicarbonate. Model 5 was adjusted for age, gender, ethnicity, white blood cell, platelet, creatinine, hypertension, anemia, hematologic malignancy, connective tissue disease, peripheral vascular disease, myocardial infarction, liver disease, chronic kidney disease, sepsis, vasopressors, corticosteroids, intravenous fluids, red blood cell transfusions, SOFA, and SAPSII.