Table 1 Maternal and neonatal characteristics of live births: United States, 2008–2018.

From: Trends in neonatal intensive care unit admissions by race/ethnicity in the United States, 2008–2018

Mother's race/ethnicity

Births, No. (%)

All

White

Black

Hispanic

Other

No. of births

38,011,843

20,202,011

5,484,266

9,233,196

3,092,370

% of births

100.0

53.1

14.4

24.3

8.1

Maternal characteristics, %

Age category, year

 < 20

7.1

5.2

10.9

10.6

3.0

 20–24

22.2

19.8

29.9

26.0

12.2

 25–29

28.7

30.0

27.3

27.5

26.6

 30–34

26.2

28.9

19.5

21.6

34.3

 35–39

12.8

13.2

9.9

11.5

19.2

 40–54

3.0

2.9

2.6

2.9

4.8

Payment sourcea

 Medicaid

43.0

31.2

65.1

59.7

31.5

 Private Insurance

47.5

61.0

26.8

26.4

57.8

 Self-Pay

4.1

2.9

2.9

7.3

5.0

 Other

4.4

4.0

4.1

5.5

4.7

 Unknown

1.1

1.0

1.0

1.2

1.1

WIC receiveda

42.4

29.0

61.5

64.8

29.9

Unmarriedb

40.4

29.2

71.0

52.6

22.8

Educational attainment

 Less than high school

16.1

8.5

17.3

34.1

9.8

 High school

25.1

21.9

33.4

30.4

16.3

 Some college

20.5

21.1

26.4

18.0

13.4

 Associate or Bachelor's degree

26.5

34.1

16.8

13.1

33.6

 Master's or higher degree

10.6

13.9

5.1

3.1

20.9

 Unknown

1.2

0.5

0.9

1.3

6.0

Urban–rural classificationc

 Large central metro

38.4

28.4

47.2

49.5

55.5

 Large fringe metro

19.5

21.0

20.5

16.4

17.8

 Medium metro

22.4

24.3

19.1

22.6

14.7

 Small metro 

9.9

12.9

7.6

6.2

5.6

 Micropolitan

7.7

10.5

4.6

4.4

4.7

 Noncore

2.1

3.0

1.0

0.9

1.8

Neonatal characteristics, %

Female

48.8

48.7

49.2

49.0

48.5

Multiple gestations

3.4

3.7

3.9

2.4

3.2

Cesarean delivery

32.4

31.6

35.7

32.0

32.7

Birthweight category, g

 < 1500

1.2

1.0

2.5

1.1

1.1

 1500–2499

6.7

5.9

10.5

5.9

7.2

 2500–3999

84.3

83.6

82.7

85.9

86.3

 ≥ 4000

7.8

9.5

4.4

7.1

5.5

Gestational age, week

 < 32

1.4

1.1

2.6

1.3

1.2

 32–36

8.2

7.8

10.5

7.8

7.8

 37–38

26.3

24.7

28.6

27.9

28.0

 39–40

57.5

59.0

52.7

57.1

57.1

  ≥ 41

6.7

7.4

5.6

6.0

5.9

5-Minute Apgar score

 < 7

1.8

1.8

3.0

1.3

1.4

 7–8

12.6

13.6

14.2

10.1

10.8

 9–10

85.5

84.5

82.8

88.6

87.8

  1. aInformation was restricted to births since 2009 when they started to be collected.
  2. bBirths occurring in or to residents of California in 2017–2018 were excluded due to state statutory restrictions.
  3. cThe National Center for Health Statistics’ (NCHS) Urban–Rural Classification Scheme for Counties was used.