Table 4 Association among previous induced abortion and hypertensive disorder of pregnancy.

From: Association of induced abortion with hypertensive disorders of pregnancy risk among nulliparous women in China: a prospective cohort study

Variable

Exposed group

Unexposed group

OR(95% CI)

aOR1(95% CI)

aOR2(95% CI)

N = 1378

Risk(%)

N = 3813

Risk(%)

HDP

57

4.1

201

5.3

0.78(0.57–1.05)

0.67(0.49–0.91)*

0.67(0.49–0.91)*

GH

34

2.5

107

2.8

0.88(0.59–1.30)

0.73(0.49–1.10)

0.72(0.48–1.09)

PE

23

1.7

94

2.5

0.67(0.42–1.06)

0.61(0.38–0.97)*

0.61(0.38–0.98)*

  1. Abbreviations: OR, odds ratio; CI, confidence intervals; aOR, adjusted odds ratio; HDP, hypertensive disorder of pregnancy; GH, gestational hypertension; PE, pre-eclampsia; GDM, gestational diabetes mellitus, BMI, body mass index. 1Adjustment confounding factors are maternal age, BMI at first antenatal visit, education, history of medical disorders, virus infection. 2Adjustment confounding factors are maternal age, education, BMI at first antenatal visit, virus infection, history of medical disorders, occupation, living area, anemia, GDM, psychological stress, conception climate, infant sex. The crude and adjusted OR and 95% CI of HDP, GH and PE were estimated by multivariable logistic regression. *p < 0.05.
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