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Table 2 Multivariable logistic regression model for the development of post-ECMO CRDs among ECMO survivors

From: Chronic respiratory disease and survival outcomes after extracorporeal membrane oxygenation

Variable Multivariable model P-value
OR (95% CI)
Age, year 1.02 (1.01, 1.03)  < 0.001
Sex, male 1.00 (0.78, 1.28) 0.987
Residence at ECMO treatment   
 Capital city (Seoul) 1  
 Other metropolitan city 0.88 (0.62, 1.27) 0.502
 Other area 1.09 (0.82, 1.46) 0.546
Year of ECMO treatment   
 2006 1  
 2007 2.17 (0.92, 5.15) 0.078
 2008 1.26 (0.52, 3.06) 0.615
 2009 1.10 (0.46, 2.67) 0.826
 2010 1.22 (0.53, 2.84) 0.638
 2011 1.58 (0.71, 3.53) 0.267
 2012 1.28 (0.58, 2.86) 0.539
 2013 1.72 (0.79, 3.72) 0.171
 2014 1.81 (0.84, 3.88) 0.129
Annual income level at ECMO treatment   
 Q1 (Lowest) or unknown 1  
 Q2 1.29 (0.87, 1.89) 0.201
 Q3 1.28 (0.90, 1.82) 0.174
 Q4 (Highest) 1.88 (1.36, 2.59)  < 0.001
Annual case volume of ECMO therapy   
 Q1 < 19 1  
 Q2: 19–43 1.03 (0.75, 1.41) 0.859
 Q3: 44–102 0.67 (0.48, 0.93) 0.017
 Q4 > 102 0.54 (0.37, 0.79) 0.002
Charlson comorbidity index, point 1.05 (0.99, 1.10) 0.088
Underlying disability   
 Mild to moderate 1.18 (0.84, 1.64) 0.344
 Severe 1.81 (1.29, 2.53) 0.001
Duration of ECMO therapy, day 1.02 (1.01, 1.03)  < 0.001
Length of hospital day, day 1.00 (0.99, 1.01) 0.675
Main diagnosis at ECMO therapy   
 Cardiovascular group 1  
 Respiratory group 2.00 (1.39, 2.89)  < 0.001
 Others 1.21 (0.99, 1.01) 0.675
  1. Hosmer Lemeshow test: Chi-square, 4.08, df = 8, P = 0.850
  2. ECMO extracorporeal membrane oxygenation, CRD chronic respiratory disease, OR odds ratio, CI confidence interval