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TABLE 4-1 Preterm Birth Rates (percent) for Married and Unmarried Women, by Maternal Age and Race-Ethnicity, 1998 to2000

Age

Non-Hispanic African American

Non-Hispanic Whites

Asians-Pacific Islanders

Americans Indians

Hispanics

Married

Unmarried

Married

Unmarried

Married

Unmarried

Married

Unmarried

Married

Unmarried

<20

13.7

17.6

10.4

11.5

12.4

14.3

10.3

12.8

10.6

12.7

20–34

13.7

16.7

7.9

10.8

8.3

11.9

10.2

12.0

9.1

11.0

≥35

16.2

22.9

8.6

14.0

9.9

14.0

13.4

16.0

11.5

14.2

SOURCE: NCHS data for U.S. birth cohorts from 1998 to 2000.



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