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HARDBACK
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1990–1994

1995–1999

 

% Total

OR

ARtotal

% Total

OR

ARtotal

 

% Among Preterm Births

% Among Preterm Births

 

% Preterm

 

 

% Preterm

 

 

 

 

10.6

 

 

11.1

 

 

5.0

1.21

2.6

4.8

1.17

1.8

 

7.3

(1.19–1.23)

 

6.5

(1.16–1.17)

 

 

15.7

 

15.1

 

 

9.9

1.20

0.9

12.6

1.21

1.6

 

10.7

(1.19–1.22)

 

14.0

(1.20–1.21)

 

 

11.3

 

12.4

 

 

37.9

0.85

–12.1

45.1

0.87

–9.6

 

30.7

(0.84–0.85)

 

39.9

(0.86–0.87)

 

 

8.4

 

9.8

 

 

21.6

1.16

7.0

19.6

1.11

4.2

 

26.9

(1.15–1.17)

 

22.8

(1.11–1.12)

 

 

13.1

 

12.8

 

 

30.2

1.35

16.2

32.3

1.23

12.1

 

41.3

(1.34–1.36)

 

40.5

(1.23–1.24)

 

 

14.6

 

13.9

 

 

40.6

1.05

–1.8

40.7

1.07

–1.4

 

39.6

(1.04–1.06)

 

39.8

(1.07–1.08)

 

 

10.3

 

10.9

 

 

3.8

1.25

2.4

3.3

1.27

1.9

 

6.0

(1.23–1.27)

 

5.1

(1.26–1.28)

 

 

17.4

 

17.0

 

 

16.4

1.97

13.8

15.4

1.69

9.8

 

27.9

(1.95–1.98)

 

23.6

(1.68–1.70)

 

 

18.0

 

17.1

 

 

17.0

1.04

–1.2

19.3

0.99

–1.5

 

16.0

(1.03–1.05)

 

17.9

(0.995–1.00)

 

 

9.9

 

 

10.3

 

 



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