Table 5 Judgment matrix and consistency test for the second-level item

I-1 age

0.148

5.192

0.044

I-2 BMI before pregnancy

0.342

I-3 BMI before parturition

0.116

I-4 medication history during pregnancy

0.085

I-5 VTE history of personal or family

0.236

I-6 area of living

0.073

II-1 internal diseases

0.750

2.000

0.000

II-2 surgical diseases

0.250

III-1 pregnancy-induced hypertension

0.532

4.078

0.030

III-2 glucose metabolic disorders

0.216

III-3 hyperemesis gravidarum

0.146

III-4 complication of assisted reproductive

0.106

IV-1 fertilization way

0.172

6.094

0.022

IV-2 delivery way

0.235

IV-3 number of fetus

0.088

IV-4 delivery gestational weeks

0.158

IV-5 time in bed

0.144

IV-6 time of operation

0.203

V-1 postpartum hemorrhage

0.668

2.000

0.000

V-2 puerperal infection

0.332