Table 1 The clinicopathological characteristics of the patients
From: Chronic respiratory disease and survival outcomes after extracorporeal membrane oxygenation
Variable | Number (%) | Mean (SD) |
|---|---|---|
Age, year | 53.4 (15.2) | |
Sex, male | 2032 (66.5) | |
Residence at ECMO treatment | ||
Capital city (Seoul) | 770 (25.2) | |
Other metropolitan city | 631 (20.7) | |
Other area | 1654 (54.1) | |
Year of ECMO treatment | ||
2006 | 114 (3.7) | |
2007 | 144 (4.7) | |
2008 | 186 (6.1) | |
2009 | 223 (7.3) | |
2010 | 271 (8.9) | |
2011 | 342 (11.2) | |
2012 | 439 (14.4) | |
2013 | 580 (19.0) | |
2014 | 756 (24.7) | |
Annual income level at ECMO treatment | ||
Q1 (Lowest) or unknown | 748 (24.5) | |
Q2 | 535 (17.5) | |
Q3 | 763 (25.0) | |
Q4 (Highest) | 1009 (33.0) | |
Annual case volume of ECMO therapy | ||
Q1 < 19 | 508 (16.6) | |
Q2: 19–43 | 735 (24.1) | |
Q3: 44–102 | 100 (34.4) | |
Q4 > 102 | 762 (24.9) | |
Charlson comorbidity index | 2.8 (2.2) | |
Underlying disability | ||
Mild to moderate | 464 (15.2) | |
Severe | 340 (11.1) | |
Length of hospital stay, day | 24.6 (15.2) | |
Duration of ECMO therapy, day | 6.2 (10.3) | |
5-year all-cause mortality | 556 (18.2) | |
Main diagnosis at ECMO treatment | ||
Cardiovascular group | 1930 (63.2) | |
Respiratory group | 281 (9.2) | |
Others | 844 (27.6) |