Table 2 Simultaneous Quantile Regression Results--by Body Mass Index Classification

Model Parameters

Observations = 1,770

Iterations = 100

Categories = 5

Independent Variables

Coefficient

Bootstrap Standard Error

t

p

95% Confidence Interval

Lower

Upper

Normal Weight (n = 477)

   Age

-0.04

0.01

-3.27

0.001

-0.07

-0.02

   Sex (1 = Male, 2 = Female)

-1.75

0.45

-3.92

<0.001

-2.63

-0.88

   Non-Hispanic White

0.29

0.58

0.50

0.614

-0.85

1.43

   African-American

0.10

1.07

0.09

0.925

-2.00

2.20

   Hispanic

1.51

0.74

2.05

0.041

0.06

2.96

   Rurality (0 = Urban, 1 = Rural)

0.53

0.45

1.18

0.238

-0.35

1.42

   Educational Attainment (1 = First Grade, 17 = Graduate School)

-0.04

0.08

-0.56

0.574

-0.19

0.11

   Minutes per week of moderate physical activity

-0.0004

0.0004

-0.83

0.407

-0.0010

0.0005

   Hours per day spent watching television

0.35

0.19

1.84

0.066

-0.02

0.71

   Constant

26.28

2.06

12.75

<0.001

22.24

30.33

Overweight (n = 664)

   Age

-0.07

0.01

-4.91

<0.001

-0.09

-0.04

   Sex (1 = Male, 2 = Female)

-1.32

0.30

-4.37

<0.001

-1.91

-0.72

   Non-Hispanic White

1.48

0.62

2.39

0.017

0.27

2.69

   African-American

3.8

1.12

3.38

0.001

1.59

6.00

   Hispanic

2.15

0.75

2.88

0.004

0.68

3.62

   Rurality (0 = Urban, 1 = Rural)

0.82

0.34

2.41

0.016

0.15

1.48

   Educational Attainment (1 = First Grade, 17 = Graduate School)

-0.13

0.07

-1.72

0.086

-0.27

0.02

   Minutes per week of moderate physical activity

-0.0006

0.0005

-1.29

0.197

-0.0020

0.0003

   Hours per day spent watching television

0.87

0.15

5.78

<0.001

0.57

1.16

   Constant

31.45

1.66

18.96

<0.001

28.20

34.7

Obese Class I (n = 427)

   Age

-0.15

0.01

-10.33

<0.001

-0.18

-0.12

   Sex (1 = Male, 2 = Female)

-0.63

0.39

-1.61

0.107

-1.39

0.14

   Non-Hispanic White

2.14

0.94

2.27

0.023

0.29

3.98

   African-American

5.61

1.48

3.80

<0.001

2.71

8.51

   Hispanic

3.11

1.33

2.34

0.020

0.50

5.72

   Rurality (0 = Urban, 1 = Rural)

0.49

0.38

1.29

0.197

-0.26

1.24

   Educational Attainment (1 = First Grade, 17 = Graduate School)

-0.36

0.10

-3.68

<0.001

-0.56

-0.17

   Minutes per week of moderate physical activity

-0.0010

0.0004

-2.77

0.006

-0.0020

-0.0003

   Hours per day spent watching television

1.02

0.19

5.36

<0.001

0.65

1.40

   Constant

42.15

2.15

19.62

<0.001

37.93

46.36

Obese Class II (n = 177)

   Age

-0.19

0.03

-6.46

<0.001

-0.25

-0.13

   Sex (1 = Male, 2 = Female)

0.44

0.59

0.74

0.462

-0.73

1.60

   Non-Hispanic White

2.63

1.58

1.67

0.095

-0.46

5.72

   African-American

8.25

2.21

3.74

<0.001

3.92

12.58

   Hispanic

2.50

1.32

1.90

0.058

-0.08

5.08

   Rurality (0 = Urban, 1 = Rural)

-0.07

0.67

-0.11

0.915

-1.39

1.25

   Educational Attainment (1 = First Grade, 17 = Graduate School)

-0.53

0.13

-3.96

<0.001

-0.80

-0.27

   Minutes per week of moderate physical activity

-0.0020

0.0006

-3.12

0.002

-0.0030

-0.0007

   Hours per day spent watching television

0.91

0.24

3.81

<0.001

0.44

1.37

   Constant

49.62

3.77

13.16

<0.001

42.22

57.01

Obese Class III (n = 236)

   Age

-0.25

0.06

-4.12

<0.001

-0.37

-0.13

   Sex (1 = Male, 2 = Female)

2.92

1.17

2.50

0.012

0.63

5.21

   Non-Hispanic White

4.64

2.64

1.76

0.079

-0.53

9.81

   African-American

12.14

4.74

2.56

0.011

2.85

21.44

   Hispanic

1.98

2.39

0.83

0.407

-2.70

6.66

   Rurality (0 = Urban, 1 = Rural)

1.36

1.14

1.19

0.233

-0.88

3.60

   Educational Attainment (1 = First Grade, 17 = Graduate School)

-0.62

0.26

-2.35

0.019

-1.14

-0.10

   Minutes per week of moderate physical activity

-0.0020

0.0006

-3.76

<0.001

-0.0040

-0.0010

   Hours per day spent watching television

1.87

0.45

4.18

<0.001

0.99

2.74

   Constant

50.91

6.48

7.85

<0.001

38.20

63.62