[Retracted] The Volume of T2 Low-Signal Band and the Width of the Widest Blood Vessel in Placenta Measured by MRI in Pregnant Women with Different Types of Placental Implantation and Its Differential Value

Table 5

Assignment table.

Variable	Assignment
Dependent variable
PI typing	Adhesion type =1, implantation type =2, penetration type =3.
Independent variable
T2 low-signal band shadow	Not have = 0, have = 1
T2 low-signal band volume	Actual value
Width of the widest blood vessel in placenta	Actual value