2.3 Univariate and logistic regression analysis results (Table 3)
The univariate analysis showed that non-survivors were related to the factors higher lactate value of ECMO 12h, 24h (9.24±3.70 vs 4.76±2.49 mmol/L, P=0.008 and 5.36±2.10 vs 2.27±1.05mmol/L, P=0.001, respectively), longer time to lactate normalization (59.34±21.13 vs 25.01±13.50h, P=0.001), lower weight (3.11±0.67 vs 3.43±0.49kg, P=0.001), longer ECMO time (145.02±90.25 vs 78.92±17.31h, P=0.005), lower the lowest PLT count (30.90±18.14 vs 48.10±20.03 × 109/L, P=0.001), more surgical site bleeding (11vs5, P=0.001) and surgical residual malformation (5vs1, P=0.04). Further logistic regression analysis revealed that higher lactate value of ECMO 24h (P=0.003), longer ECMO duration (P=0.015) and more surgical site bleeding event (P=0.025) were independent risk factors for non-survivors.