[Retracted] Clinical Application of a Multiparameter-Based Nomogram Model in Predicting Preeclampsia

Table 3

Variable assignment table.

Variable	Code	Specific assignment
Age	X1	≥35 years old = 1, <35 years old = 0
Prepregnancy BMI	X2	≥24 = 1, <24 = 0
Lack of vitamin E	X3	yes = 1, no = 0
25-(OH)D	X4	Actual value entry
PLGF	X5	Actual value entry
PAPP-A	X6	Actual value entry
PI	X7	Actual value entry