Table 2 Factorial ANOVA across low birth weight clusters. Asterisks reflect significance at a significance level of 0.001

Cluster

High-High

Low-Low

Low-High

High-Low

P-value

Counties per Cluster

725

1021

161

193

Demographic Variable

Mean

SD

Mean

SD

Mean

SD

Mean

SD

Population

66370.72

123966.7

110074.2

399492.9

69749.57

115894.8

195134.5

519333.4

1.07E-05*

% White

69.22

20.42

89.72

10.22

84.58

11.14

84.67

17.68

2.92E-143*

% Black

25.77

20.4

2.11

2.85

9.72

9.61

5.48

7.74

1.15E-248*

% American Indian

0.62

2.36

1.94

6.45

0.94

4.17

3.72

14.46

8.65E-09*

% Asian

0.87

1.14

1.73

3.18

1.22

1.76

1.51

2.72

6.69E-11*

% Hispanic

5.68

8.33

7.31

9.54

6.07

7.25

7.44

9.2

0.000999*

Median Household Income

44430.52

11380.09

59225.79

13116.82

53804.39

16338.27

53001.26

9956.9

4.56E-112*

% With SNAP Benefits in Past Year

17.75

6.58

9.72

4.38

12.9

5.84

12.82

5.91

2.66E-163*

% With Health Insurance

89.15

3.51

92.75

4.13

90.27

3.63

91.04

6.11

1.73E-66*

% With Public Health Insurance

44.25

8.61

36.8

7.97

39.34

9.74

39.87

7

5.00E-69*

% Families in Poverty

15.34

5.72

7.82

3.35

10.77

5.01

10.51

5.57

8.77E-194*

% Households: Married

46.35

7.22

52.31

5.17

52.51

6.09

48.6

6.51

6.01E-86*

% Households: Single Parent

6.3

2.51

3.81

1.35

4.66

1.7

4.76

2.2

3.31E-132*

% Births: Unmarried

45.05

20.83

29.92

14.97

31.85

18.82

36.18

16.1

9.78E-65*

% 25 + Year Old: Bachelor’s Degree or Beyond

18.86

9.19

24.62

9.28

22.76

11.82

21.86

7.72

1.34E-33*

% Households: Spanish Speaking

4.11

5.57

5.02

7.7

4.08

4.45

5.21

7.72

0.0179

Population Density

177.29

446.45

287.84

2608.33

194.83

331.32

776.73

3267.5

0.00491

2013 Rural Urban Cont. Code

4.89

2.54

5.11

2.74

4.3

2.86

4.97

2.81

0.004411