Table 1. Demographic Characteristics of Respondents, Study of Effect of Media Use on Body Weight Among Adolescents, Texas 2015–2016a , b .
| Variable | All | Boys | Girls | P Valuec |
|---|---|---|---|---|
| Unweighted sample size, no. | 9,056 | 4,555 | 4,501 | NA |
| Weighted sample size, no. | 659,288 | 336,613 | 322,675 | |
| Sex, % (CI) | NA | 51.1 (46.9–55.2) | 48.9 (44.8–53.1) | .60 |
| School grade | ||||
| 8th | 52.7 (39.9–65.6) | 53.1 (39.3–67.0) | 52.3 (39.1–65.5) | .90 |
| 11th | 47.3 (34.4–60.1) | 46.9 (33.0–60.7) | 47.7 (34.5–60.9) | |
| Age, mean (SD) | 15.0 (0.2) | 15.0 (0.2) | 14.9 (0.2) | .80 |
| Race/ethnicity | ||||
| Black | 12.5 (8.0–17.1) | 12.5 (7.8–17.2) | 12.5 (7.4–17.7) | >.99 |
| Hispanic | 50.9 (43.1–58.8) | 50.9 (42.0–59.7) | 51.0 (42.8–59.2) | |
| White/other | 36.6 (28.1–45.0) | 36.6 (26.8–46.4) | 36.5 (28.2–44.8) | |
| Economic disadvantage tertilesd | ||||
| Lowest | 46.5 (34.0–59.0) | 47.9 (34.3–61.4) | 45.1 (32.5–57.7) | .60 |
| Middle | 29.6 (20.2–39.1) | 29.7 (19.1–40.3) | 29.5 (20.0–39.1) | |
| Upper | 23.9 (12.1–35.6) | 22.4 (11.3–33.6) | 25.4 (12.5–38.2) | |
| Body mass indexe | ||||
| Healthy weight | 59.8 (56.8–62.8) | 57.7 (52.6–62.9) | 62.0 (58.5–65.4) | .01 |
| Overweight | 17.9 (15.8–20.0) | 16.7 (13.1–20.2) | 19.2 (16.7–21.7) | |
| Obese | 22.3 (19.3–25.2) | 25.6 (21.3–29.9) | 18.8 (16.4–21.2) | |
| Timing of last food intake, mean of weekdays and weekends | ||||
| Before 7 PM | 12.3 (8.7–15.8) | 13.4 (7.7–19.1) | 11.2 (8.3–14.0) | .30 |
| Between 7 PM and 10 PM | 50.5 (47.1–53.9) | 51.5 (46.5–56.5) | 49.4 (45.3–53.5) | |
| 10 PM or later | 37.2 (34.2–40.3) | 35.1 (31.1–39.1) | 39.4 (36.0–42.9) | |
| Timing of last food intake, weekdays only | ||||
| Before 7 PM | 17.3 (13.7–20.9) | 18.3 (12.4–24.2) | 16.2 (13.3–19.2) | .04 |
| Between 7 PM and 10 PM | 50.1 (46.3–53.9) | 53.0 (48.0–58.0) | 47.2 (42.6–51.7) | |
| 10 PM or later | 32.6 (29.9–35.3) | 28.7 (25.3–32.1) | 36.6 (32.9–40.3) | |
| Timing of last food intake, weekends only | ||||
| Before 7 PM | 11.1 (7.9–14.3) | 13.3 (7.6–19.1) | 8.8 (6.8–10.9) | .03 |
| 7 PM–10 PM | 35.9 (32.6–39.1) | 37.5 (32.5–42.5) | 34.2 (30.8–37.5) | |
| 10 PM or later | 53.0 (49.7–56.3) | 49.2 (44.7–53.7) | 57.0 (53.3–60.7) | |
| Hours of sleep, mean (SD) | 7.0 (0.2) | 7.1 (0.2) | 6.9 (0.2) | .91 |
| <8 | 58.8 (54.7–63.0) | 55.3 (49.9–60.7) | 62.5 (58.7–66.4) | .001 |
| 8–9 | 37.8 (34.0–41.5) | 41.9 (36.8–47.0) | 33.5 (30.1–36.8) | |
| ≥10 | 3.4 (2.2–4.5) | 2.8 (1.5–4.1) | 4.0 (2.4–5.6) | |
| Hours of media use | ||||
| ≤2 | 11.3 (9.6–13.0) | 9.7 (7.6–11.8) | 13.0 (10.9–15.0) | .10 |
| 3–5 | 26.2 (22.5–29.9) | 28.3 (22.6–34.0) | 24.0 (20.0–28.1) | |
| ≥6 | 62.5 (58.4–66.6) | 62.0 (55.9–68.2) | 63.0 (58.7–67.3) | |
| Unhealthy eating behavior, tertile, mean (SD) | 50.9 (0.2) | 50.4 (0.3) | 51.4 (0.2) | .90 |
| Lowest | 33.0 (29.7–36.4) | 35.3 (31.5–39.1) | 30.6 (26.6–34.7) | .006 |
| Middle | 41.1 (36.5–45.7) | 42.1 (37.1–47.1) | 40.1 (35.0–45.2) | |
| Upper | 25.9 (23.1–28.6) | 22.6 (18.8–26.3) | 29.3 (25.9–32.6) | |
| Reported days of physical activity | ||||
| ≥7 | 22.5 (20.5–24.4) | 31.3 (27.5–35.0) | 13.4 (10.9–15.9) | <.001 |
| <7 | 77.5 (75.6–79.5) | 68.7 (65.0–72.5) | 86.6 (84.1–89.1) | |
Abbreviations: CI, confidence interval; NA, not applicable; SD, standard deviation.
a
Data are from the School Physical Activity and Nutrition Survey, 2015–2016 (32).
b
Values are weighted percentage (95% CI) unless otherwise indicated.
c
Rao-Scott χ2 test was used to calculated P values.
d
Economic status data were obtained from the Texas Education Agency (20).
e
CDC standard growth charts for children and adolescents. (https://www.cdc.gov/healthyweight/bmi/calculator.html) were used to classify BMI categories (healthy weight, <85th percentile; overweight, 85th–95th percentile; obese, ≥95th percentile).