Table 1

Demographic and reproductive characteristics of study population by pregnancy-induced hypertension, Suzhou, China, 1989–1990

Subjects


Characteristics*

No.

%

Normotensive

(N=10,669) %

Gestational hypertension

(N=782) %

Preeclampsia

(N=365) %

Severe preeclampsia

(N=105) %

Statistical significance

2test)


Maternal age

≤30

11,230

94.2

94.6

90.3

91.5

94.3

0.000

> 30

691

5.8

5.4

9.7

8.5

5.7

Parity

Nulliparous

11,365

95.3

95.3

94.9

97.8

97.1

0.100

Multiparous

556

4.7

4.7

5.1

2.2

2.9

Sex

Male

6,026

50.5

50.8

48.6

47.4

55.2

0.290

Female

5,895

49.5

49.2

51.4

52.6

44.8

Preterm birth (<37 weeks)

No

11,527

96.7

96.6

98.2

96.7

93.3

0.023

Yes

394

3.3

3.4

1.8

3.3

6.7

Low birth weight (<2,500 g)

No

11,620

97.5

97.6

97.3

95.1

92.4

0.000

Yes

301

2.5

2.4

2.7

4.9

7.6

Mean gestational age (Weeks)

39.30

39.29

39.44

39.30

38.69

0.000 (Analysis of variance)

Place of delivery

Hospital

11,900

99.8

99.8

99.7

100

100

0.981

Home

11

0.1

0.1

0.1

0

0

BMI

< 24

11,012

92.8

93.1

90.0

89.6

93.3

0.005

24–28

426

3.6

3.4

5.3

5.8

4.8

> 28

432

3.6

3.5

4.7

4.6

1.9

Infant complications No Yes

No

10,989

93.1

93.1

90.9

87.0

88.5

0.000

Yes

810

6.9

6.4

9.1

13.0

11.5


* Excluding cases with missing information.

Baulon et al. BMC Pregnancy and Childbirth 2005 5:10   doi:10.1186/1471-2393-5-10

Open Data