Table 3. Poisson regression models predicting overweight at age 11 years, stratified by child gender.
|
RR (95% CI) |
|||
|---|---|---|---|
| Model 1 | Model 2 | Model 3 | |
| Boys (n=6353) | |||
| TV in the bedrooma | 1.31 (1.16, 1.48)*** | 1.23 (1.09, 1.39)** | 1.21 (1.07, 1.36)** |
| TV/DVD hoursb | |||
| 1–<3 h | 1.15 (0.97, 1.35) | 1.09 (0.93, 1.27) | 1.06 (0.90, 1.23) |
| ⩾3 h | 1.22 (0.99, 1.51) | 1.11 (0.91, 1.35) | 1.06 (0.87, 1.29) |
| Computer hoursc | |||
| <1 h | 0.83 (0.69, 1.00) | 0.90 (0.76, 1.08) | 0.90 (0.75, 1.07) |
| ⩾1 h | 0.86 (0.71, 1.04) | 0.92 (0.77, 1.10) | 0.91 (0.76, 1.08) |
| Girls (n=6203) | |||
| TV in the bedrooma | 1.37 (1.22, 1.53)*** | 1.33 (1.17, 1.51)*** | 1.31 (1.15, 1.48)*** |
| TV/DVD hoursb | |||
| 1–<3 h | 1.22 (1.06, 1.41)** | 1.20 (1.04, 1.38)* | 1.18 (1.03, 1.36)* |
| ⩾3 h | 1.34 (1.13, 1.60)** | 1.30 (1.09, 1.55)** | 1.27 (1.07, 1.52)** |
| Computer hoursc | |||
| <1 h | 1.03 (0.85, 1.25) | 1.03 (0.86, 1.24) | 1.03 (0.85, 1.23) |
| ⩾1 h | 1.10 (0.90, 1.35) | 1.08 (0.89, 1.32) | 1.07 (0.88, 1.30) |
Abbreviations: CI, confidence interval; DVD, digital versatile disk; RR, relative risk; TV, television. Exposure: screen-based media use at age 7 years. ***P<0.001; **P<0.01; *P<0.05.
Model 1: adjusted for child age at interview
Model 2: Model 1+child ethnicity, child BMI (wave 2), breastfeeding duration, maternal BMI (wave 2), maternal education (wave 5), and family income (wave 5).
Model 3: Model 2+bedtime (wave 4/age 7 years), physical activity (wave 4/age 7 years).
Weighted results.
a
Reference category: no TV in the bedroom.
b
Reference category:<1 h during term-time weekday.
c
Reference category: none during term-time weekday.