Cover Image

HARDBACK
$69.95



View/Hide Left Panel

TABLE B-8 Risk Factors for Preterm Birth

 

1980–1984

1985–1989

 

% Total

OR

ARtotal

% Total

OR

ARtotal

 

% Among Preterm Births

% Among Preterm Births

Factor

% Preterm

 

 

% Preterm

 

 

Total % Preterm

 

9.1

 

 

9.8

 

Age in teens

5.3

1.3

3.9

4.6

1.20

3.2

 

8.7

(1.29–1.31)a

7.6

(1.19–1.21)

 

 

15.8

16.1

 

Older age

5.2

1.19

0.3

7.6

1.21

0.4

 

5.6

(1.18–1.20)

7.9

(1.21–1.22)

 

 

9.7

10.2

 

High level of education

34.3

0.84

–11.9

38.3

0.84 –

13.0

 

27.4

(0.84–0.85)

30.3

(0.83–0.84)

 

 

7.0

7.8

 

Low level of education

19.6

1.26

8.9

18.4

1.21

7.8

 

26.1

(1.26–1.27)

24.8

(1.21–1.22)

 

 

12.4

13.2

 

Unmarried

19.3

1.42

14.8

24.0

1.43

16.8

 

30.7

(1.42–1.43)

36.7

(1.42–1.43)

 

 

15.0

15.0

 

Primiparous

42.3

1.10

0.3

41.3

1.08

–0.7

 

42.9

(1.10–1.11)

40.9

(1.07–1.08)

 

 

9.1

9.7

 

High parity

3.6

1.20

2.1

3.1

1.23

2.1

 

5.3

(1.19–1.22)

5.2

(1.22–1.24)

 

 

15.0

16.3

 

African-American race

15.6

1.91

14.8

15.8

1.94

15.0

 

27.9

(1.91–1.92)

28.5

(1.93–1.95)

 

 

16.5

17.6

 

Foreign born

9.9

1.03

0.22

13.1

1.01

–0.2

 

10.2

(1.02–1.04)

12.9

(1.00–1.01)

 

 

9.2

 

 

9.6

 

 



The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement