Table 1.
Descriptive statistics of the sample by dietary choices (n 13 284)†
| Fruit and vegetable consumption (%)‡
|
Fast food consumption (%)§
|
Total | |||||
|---|---|---|---|---|---|---|---|
| Yes | No | P | No | Yes | P | ||
| Sleep duration | |||||||
| Short (<7 h) | 15·1 | 21·6 | <0·0001*** | 15·8 | 19·5 | 0·0001*** | 18·0 |
| Mid-range (7–8 h) | 62·7 | 57·4 | <0·0001*** | 60·9 | 60·0 | 0·4941 | 60·3 |
| Recommended (>8 h) | 22·2 | 21·0 | 0·2402 | 23·3 | 20·5 | 0·0230* | 21·7 |
| Mean age (years) | 15·8 | 16·1 | <0·0001*** | 15·7 | 16·1 | <0·0001*** | 16·0 |
| Sex | |||||||
| Male | 49·6 | 50·3 | 0·6234 | 47·3 | 51·8 | 0·0003*** | 49·9 |
| Race/ethnicity | |||||||
| White | 67·5 | 67·3 | 0·9007 | 67·4 | 67·4 | 0·9883 | 67·4 |
| Black | 13·0 | 17·8 | <0·0001*** | 14·7 | 15·5 | 0·4840 | 15·2 |
| Hispanic | 13·4 | 10·7 | 0·0034** | 12·3 | 12·1 | 0·8591 | 12·2 |
| Other | 6·1 | 4·1 | 0·0011** | 5·6 | 5·0 | 0·3470 | 5·2 |
| Pubertal status | |||||||
| Reached puberty | 73·6 | 73·5 | 0·9681 | 73·7 | 73·5 | 0·8735 | 73·6 |
| Mother’s education level | |||||||
| Less than high school | 16·1 | 16·7 | 0·5622 | 16·9 | 16·0 | 0·2696 | 16·4 |
| High-school diploma/GED | 38·6 | 43·7 | 0·0001*** | 41·3 | 40·5 | 0·5046 | 40·8 |
| Some college or more | 45·3 | 40·0 | 0·0001*** | 42·0 | 43·5 | 0·1960 | 42·8 |
| Perception of neighbourhood safety | |||||||
| Feel unsafe | 9·5 | 11·1 | 0·0549 | 10·4 | 10·0 | 0·5346 | 10·2 |
| Physical activity level | |||||||
| Low (0–1 times/week) | 12·5 | 23·4 | <0·0001*** | 16·1 | 18·1 | 0·0336* | 17·3 |
| Medium (2–4 times/week) | 48·1 | 51·5 | 0·0056** | 48·5 | 50·4 | 0·0739 | 49·6 |
| High (≥5 times/week) | 39·4 | 25·1 | <0·0001*** | 35·4 | 31·4 | 0·0007*** | 33·1 |
| Screen time | |||||||
| Low (0–14 h/week) | 50·0 | 46·0 | 0·0034** | 50·5 | 46·4 | 0·0048** | 48·2 |
| Medium (15–28 h/week) | 27·9 | 26·8 | 0·3222 | 27·1 | 27·7 | 0·6394 | 27·4 |
| High (≥29 h/week) | 22·2 | 27·2 | 0·0001*** | 22·3 | 25·9 | 0·0011** | 24·4 |
| Mean number of siblings at home | 1·38 | 1·31 | 0·017* | 1·40 | 1·31 | 0·004** | 1·35 |
| Presence of two biological parents at home | 56·5 | 48·3 | <0·0001*** | 54·0 | 52·1 | 0·1770 | 52·9 |
GED, General Educational Development.
Values were significantly different:
*
P<0·05,
**
P<0·01,
***
P<0·001.
†
Participants were excluded if they had missing data on any of the following variables: sleep duration; age; race/ethnicity. Due to the high prevalence of missing data on mother’s education level, we imputed these values.
‡
Yes = consumed at least one fruit and vegetable on the previous day; No = did not consume at least one fruit and vegetable on the previous day.
§
Yes = consumed fast food ≥2 times in the previous week; No = consumed fast food 0–1 times in the previous week.