Table 4 Multivariate analysis for duration of ICU stay with the subgroups according to the interquartile of time weighted delta lactate change

Age (month)

0.01

0.39

Gender (male)

0.20

0.93

RACHS-1

1.75

0.19

Lowest temperature during CPB (°C)

−0.33

0. 31

CPB time (min)

0.015

0. 55

The use of epinephrine after weaning from CPB

16.8

<0.001

Lac_FIRST (mmol/L)

1.17

0.17

Group1(1^st quartile of LAC⊿tw)

reference

Group2 (2^nd quartile of LAC⊿tw) (vs. Group1)

2.60

0.39

Group3 (3^rd quartile of LAC⊿tw) (vs. Group1)

0.16

0.96

Group4 (4^th quartile of LAC⊿tw) (vs. Group1)

6.14

0.048