Mean

Number (%)

p

Age

Hypertensive disorders of pregnancy

28.4

-

<0.001

No hypertensive disorders of pregnancy

27.3

-

Nulliparous

Hypertensive disorders of pregnancy

980 (44.0)

No hypertensive disorders of pregnancy

13,275 (36.4)

<0.001

Twin pregnancy

Hypertensive disorders of pregnancy

121 (5.4)

<0.001

No hypertensive disorders of pregnancy

973 (2.8)

Diabetes

Hypertensive disorders of pregnancy

108 (4.9)

No hypertensive disorders of pregnancy

652 (1.9)

<0.001