Table 5

First Stage Parameter Estimates from the Tobit Equations: Females (t ratios in parentheses)a

Independent Variables

Primary Eating Time

Secondary Eating Time

Secondary Drinking Time

Food Preparation Time

Physical Activity Time

Sleep Time

Television/video Time


Intercept

-2.59 (-1.61)*

15.67 (3.50)**

18.43 (1.42)

0.17 (.07)

10.95 (1.28)

58.22 (14.52)**

29.08 (5.41)**


Age

-0.03 (-2.33)**

0.13 (3.57)**

0.24 (2.20)**

0.11 (4.81)**

.37 (5.08)**

-0.15 (-4.34)**

0.04 (.78)


Married/Cohabitating

0.72 (5.41)**

-0.63 (-1.71)*

-0.98 (-.93)

2.44 (11.26)**

0.40 (.57)

-0.94 (-2.83)**

-1.15 (-2.59)**


Education

0.07 (1.75)*

0.44 (3.87)**

1.24 (3.72)**

-0.32 (-4.95)**

-0.04 (-.21)

-0.52 (-5.11)**

-0.76 (-5.50)**


Black

-1.01 (-6.09)**

-1.35 (-2.91)**

-12.84 (-9.33)**

-0.30 (-1.12)

-4.32 (-4.68)**

1.71 (4.14)**

2.24 (4.03)**


Hispanic

0.56 (3.06)**

-3.73 (-7.33)**

-19.02 (-12.24)**

1.96 (6.92)**

-4.79 (-4.91)**

1.54 (3.46)**

-0.70 (-1.17)


Other

0.78 (3.28)**

-2.24 (-3.36)**

-12.70 (-6.40)**

2.37 (6.28)**

-3.03 (-2.38)**

1.37 (2.33)**

-2.48 (-3.08)**


Fair/Poor Health

-0.67 (-4.29)**

-1.34 (-3.05)**

2.15 (1.70)*

0.47 (1.88)*

-3.40 (-4.03)**

0.97 (2.50)**

2.34 (4.52)**


Employed

-.57 (-4.89)**

-0.86 (-2.55)**

3.10 (3.15)**

-2.12 (-11.04)**

-3.30 (-5.24)**

-1.80 (-5.97)**

-5.52 (-13.70)**


Grocery Price Index

0.02 (3.10)**

0.010 (.35)

-0.04 (-.99)

0.01 (.80)

0.11 (3.93)**

-0.01 (-.50)

-0.02 (-1.45)


Weekend

0.86 (7.59)**

-0.44 (-1.39)

-1.63 (-1.78)*

0.18 (.80)

3.06 (5.18)**

5.84 (20.63)**

4.07 (10.73)**


Primary Grocery Shopper

-0.17 (-.90)

-0.19 (-.36)

1.31 (.86)

1.42 (4.51)**

4.50 (4.19)**

-0.81 (-1.70)*

-1.21 (-1.89)*


Primary Meal Preparer

-0.20 (1.26)

.37 (.86)

-3.04 (-2.49)**

2.80 (10.90)**

2.61 (3.07)**

0.01 (.02)

-0.13 (-.26)


Summer

0.14 (1.19)

1.37 (4.23)**

3.43 (3.65)**

-.27 (-1.42)

3.70 (6.02)**

-0.24 (-.83)

-0.62 (-1.56)


ATUS07

-.14 (-1.30)

2.04 (7.11)**

4.79 (5.74)**

0.18 (1.06)

-1.28 (-2.31)**

-0.50 (-1.94)*

0.18 (.52)


Hourly Opportunity Cost of time

0.04 (2.14)**

-0.07 (-1.33)

-.48 (-2.97)**

0.07 (2.14)**

-0.11 (-1.05)

0.15 (2.93)**

-0.16 (-2.30)**


Ln (Non-Wage Income)

0.95 (3.67)**

-3.84 (-5.31)**

-5.93 (-2.97)**

-.60 (-1.43)

-6.72 (-4.81)**

0.61 (.94)

0.15 (.17)


Number of Kids < Age 6

-0.11 (-1.10)**

-0.28 (-.55)

-0.91 (-1.16)

1.25 (1.11)

-3.04 (-5.61)**

-0.55 (-2.26)**

-1.81 (-5.53)**


Number of Kids Age 6-17

-.32 (-5.69)**

-0.09 (-.55)

.08 (.17)

1.11 (12.39)**

-0.65 (-2.16)**

-0.24 (-1.70)*

-1.02 (-5.41)**


*p < .10, **p < .05

a Time use is measured in 10 minute increments.

Zick et al. International Journal of Behavioral Nutrition and Physical Activity 2011 8:84   doi:10.1186/1479-5868-8-84

Open Data