Table 2 Univariate analysis of length of stay

Age (years)

1.02(0.98,1.21)

0.258

BMI (kg/m²)

1.11 (0.72,1.52)

0.324

ASA

1.05(0.70,1.46)

0.159

Gestational age at delivery (days)

1.15(0.64,1.20)

0.267

Birthweight (g)

2.10(1.71,2.76)

 < 0.001

Operation time(min)

1.52(1.24,1.75)

 < 0.001

Pre-Hgb (g/dl)

1.45(0.93,1.71)

0.254

Pre-Hct (%)

1.42(1.29,1.58)

 < 0.001

Experience of obstetrician

1.12(0.94,1.46)

0.078

Blood transfusion (yes)

1.56(1.15,1.98)

0.032