Table 1.
Sample Characteristics at Age 17 Years Among Female and Male Youth in the Growing Up Today Study (N=6649)
| Females | Males | |||
|---|---|---|---|---|
| (n=4913) | (n= 1736) | |||
| Characteristics | ||||
| YOUTH FACTORS | ||||
| Youth Socially Assigned Gender Expression (n, %) | ||||
| Very gender conforming | 1363 | 27.7 | 712 | 41.0 |
| Mostly gender conforming | 3200 | 65.1 | 958 | 55.2 |
| Gender nonconforming | 350 | 7.1 | 66 | 3.8 |
| Youth Sexual Orientation (n, %) | ||||
| Completely heterosexual | 4046 | 82.4 | 1503 | 86.6 |
| Mostly heterosexual | 695 | 14.2 | 140 | 8.1 |
| Bisexual | 102 | 2.1 | 17 | 1.0 |
| Lesbian/Gay | 70 | 1.4 | 76 | 4.4 |
| Youth BMI (kg/m2) (m, std. dev.) | 22.0 | 3.3 | 23.2 | 3.9 |
| Youth Weight-Related Behaviorsa | ||||
| Binge Eating (n, %) | ||||
| Yes | 305 | 6.2 | 26 | 1.5 |
| No | 4600 | 93.6 | 1708 | 98.4 |
| Missing | 8 | 0.2 | 2 | 0.1 |
| Dieting (m, std. dev.) | 2.1 | 1.2 | 1.5 | 1.0 |
| Fasting (m, std. dev.) | 1.3 | 0.8 | 1.1 | 0.5 |
| Breakfast (m, std. dev.) | 3.5 | 0.9 | 3.5 | 0.9 |
| Family Dinner (m, std. dev.) | 3.0 | 0.9 | 3.1 | 0.9 |
| Fast Food (m, std. dev.) | 1.5 | 0.6 | 1.8 | 0.7 |
| Sugar-Sweetened Beverages (m, std. dev.) | 2.6 | 1.5 | 3.5 | 1.6 |
| Physical Activity (m, std. dev.) | 9.2 | 7.5 | 10.2 | 7.7 |
| TV Viewing (m, std. dev.) | 6.4 | 6.0 | 7.9 | 7.0 |
| Sleep (m, std. dev.) | 4.1 | 1.1 | 4.2 | 1.0 |
| MATERNAL FACTORS | ||||
| Maternal BMI (kg/m2) at Age 18 Years (m, std. dev.) | 21.0 | 2.8 | 21.0 | 3.0 |
| Maternal Annual Household Income (n, %) | ||||
| Less than $74,999 | 1507 | 30.7 | 535 | 30.8 |
| $75,000-$99,999 | 915 | 18.6 | 335 | 19.3 |
| $100,000-$149,000 | 1041 | 21.2 | 377 | 21.7 |
| $150,000 and above | 641 | 13.1 | 230 | 13.3 |
| Missing income | 809 | 16.5 | 259 | 14.9 |
Youth Weight-Related Behaviors: Binge eating (binary, any binge eating in the past year); Dieting (ordinal, five levels ranging from never to always); Fasting (ordinal, five levels ranging from never to 2-6 times per week/daily); Breakfast (days per week; ordinal, four levels ranging from never to 5 or more times per week); Family dinner (days/week; ordinal, four levels ranging from never to 5 or more times per week); Fast food (days/week; ordinal, four levels ranging from never to daily); Sugar-sweetened beverages (servings/day; ordinal, seven levels ranging from never/less than once per month to 3 or more servings per day); Physical activity (hours/week in moderate/vigorous activity; ordinal, seven levels ranging from 0 to 11 or more hours); TV viewing (hours/week viewing TV; ordinal, eight levels ranging from 0 to 18 or more hours); Sleep (hours sleep/night; ordinal, eight levels ranging from less than 5 to 11 or more hours).