Table 1.
Descriptive statistics for sample (n=4896).
| Variable and definition | Mean | SD |
|---|---|---|
| Continuous individual variables | ||
| Age in months | 134.3 | 4.6 |
| Days/week child gets exercise that causes rapid breathing, perspiration and a rapid heartbeat for 20 continuous minutes or more | 3.8 | 1.8 |
| Hours/week child watches television | 7.3 | 3.7 |
| How often parents help with homework | 4.2 | 2.9 |
| How often parents talk with child about friends | 5.3 | 0.9 |
| Categorical variables | Percent | |
| Girls | 51.1 | |
| White | 64.5 | |
| Black | 7.7 | |
| Hispanic | 18.2 | |
| Asian | 5.6 | |
| Annual family income <$25,000 | 14.9 | |
| ≥25,000 and <75,000 | 46.0 | |
| ≥75,000 | 39.1 | |
| Receives free/reduced lunch | 25.6 | |
| Mother’s education: less than high school diploma | 7.1 | |
| High school diploma or equivalent | 21.3 | |
| Some college | 35.9 | |
| Bachelor’s degree or higher | 35.7 | |
| Attends private school | 20.4 | |
| Frequency of food/beverage consumption: | ||
| Number of times in past 7 days: | ||
| - ate fruit or vegetables | 19.9 | 17.9 |
| - ate fast food | 2.7 | 4.2 |
| - drank milk (glasses) | 11.1 | 9.4 |
| - drank sugar-sweetened beverages | 5.9 | 7.2 |
Note: unweighted statistics for estimation sample.
SD, standard deviation.