Table 1 Main patients characteristics, before weighing using a propensity score
Variable | DL | SL | p value |
|---|---|---|---|
N = 2467 | N = 4367 | ||
Age (years) | 46 (32–58) | 48 (35–60) |  < 0.0001 |
Male gender [n (%)] | 1386 (56.5) | 2612 (62.0) |  < 0.0001 |
Weight (kg) | 83 (70–102) | 80 (68–100) | 0.0001 |
Total ECMO hours | 191 (97–362) | 189 (96–336) | 0.058 |
Pre-ECMO arrest [n (%)] | 165 (6.7) | 294 (6.7) | 0.984 |
FiO2 prior to ECMO (%) | 100 (100–100) | 100 (100–100) | 0.608 |
PIP prior to ECMO (cmH2O) | 35 (30–40) | 34 (30–38) |  < 0.0001 |
PEEP prior to ECMO (cmH2O) | 13 (10, 16) | 14 (10, 16) | 0.367 |
pH prior to ECMO | 7.24 (7.14–7.33) | 7.24 (7.15–7.34) | 0.152 |
PaCO2 prior to ECMO (mmHg) | 57 (43–75) | 52 (37–69) |  < 0.0001 |
PaO2 prior to ECMO (mmHg) | 59 (45–75) | 56 (41, 72) |  < 0.0001 |
HCO3 prior to ECMO (mEq/L) | 25 (21–31) | 24 (20–29) |  < 0.0001 |
Intubation hours prior to ECMO | 45 (13–131) | 41 (15–120) | 0.166 |
Pump flow at 4 h (L/min) | 4.0 (3.4–4.5) | 4.0 (3.4–4.8) |  < 0.01 |
Pump flow at 24 h (L/min) | 4.0 (3.4–4.6) | 4.1 (3.4–4.8) |  < 0.01 |
Alive at hospital discharge [n (%)] | 1580 (64.0) | 2595 (60.8) | 0.002 |