Table 2 Predictors of perinatal blood transfusion in the training set

Age, means ± SD (years)

33.03 ± 5.56

31.02 ± 4.23

2.729

0.007

Gestational age, Medians (lower quartile, upper quantile) (days)

252 (271–276)

273 (268–279)

-3.048

0.002

Anesthesia, n (%)

 < 0.001

 Spinal-epidural anesthesia

63 (88.7)

170 (100)

 General anesthesia

8 (11.3)

0 (0)

Emergency

37 (52.1)

84 (49.4)

0.146

0.702

Predelivery hemoglobin, means ± SD (g/L)

109.89 ± 14.04

114.91 ± 12.17

-2.787

0.006

Predelivery hematocrit, means ± SD (%)

33.16 ± 4.08

35.34 ± 3.16

-4.109

 < 0.001

Predelivery platelets, means ± SD (*10⁹/L)

205.85 ± 67.45

223.54 ± 54.05

-1.962

0.052

Predelivery fibrinogen, means ± SD (g/L)

3.87 ± 0.83

4.29 ± 0.68

-4.143

 < 0.001

Preeclampsia, n (%)

14 (19.7)

6 (3.5)

17.248

 < 0.001

HELLP, n (%)

4 (5.6)

0 (0)

0.007

GDM, n (%)

12 (16.9)

34 (20.0)

0.311

0.577

Fibroid, n (%)

6 (8.5)

7 (4.1)

0.212

Abnormal placentation, n (%)

26 (36.6)

13 (7.6)

30.995

 < 0.001

Polyembryony, n (%)

6 (8.5)

0 (0)

 < 0.001

Coagulation disorders, n (%)

3 (4.2)

0 (0)

0.025

Predelivery oxytocin, n (%)

7 (9.9)

10 (5.9)

1.208

0.272

Hepatitis B virus carrier or abnormal liver function, n (%)

1 (1.4)

5 (2.9)

0.673