Table 5.
Weight status, body image and obesity-related health practices: mediation models for girls
| Dependent variables |
||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| physical activity |
screen-based media use |
breakfast consumption |
smoking | |||||||||
| IM, β (95% CI) | MM, β (95% CI) | change in β, % | IM, β (95% CI) | MM, β (95% CI) | change in β, % | IM, β (95% CI) | MM, β (95% CI) | change in β, % | IM, β (95% CI) | MM, β (95% CI) | change in β, % | |
| Weight status | ||||||||||||
| Overweight | −0.21 | −0.07 | NAIM | 0.30 | 0.24 | CM | −0.21 | −0.06 | NAIM | 1.32 | 1.16 | NAIM |
| (−0.47; 0.05) | (−0.33; 0.18) | (0.04; 0.57) | (−0.02; 0.50) | (−0.44; 0.02) | (−0.31; 0.19) | (0.97; 1.79) | (0.85; 1.58) | |||||
| Obese | −0.31 | −0.06 | CM | 0.56 | 0.44 | 21% | −0.41 | −0.14 | CM | 1.67 | 1.25 | CM |
| (−0.56; −0.05) (−0.32; 0.21) | (0.14; 0.97) | (0.01; 0.86) | (−0.64; −0.19) | (−0.41; 0.12) | (1.24; 2.20) | (0.93; 1.68) | ||||||
|
| ||||||||||||
| Body image | - | 0.24 (0.16; 0.34) | - | −0.12 | - | 0.26 | - | 0.74 | ||||
| (−0.22; −0.01) | (0.19; 0.33) | (0.66; 0.82) | ||||||||||
|
| ||||||||||||
| Model Fit | ||||||||||||
| R-squared | 0.03 | 0.05 | 0.13 | 0.14 | 0.04 | 0.07 | - | - | ||||
| F (df) | 5.98 | 7.42 | 20.11 | 17.48 | 12.74 | 25.24 | ||||||
| (8; 86)*** | (9; 85)** | (8; 86)*** | (9; 85)*** | (8; 86)*** | (9; 85)*** | |||||||
| p value a | 0.040 | 0.817 | 0.002 | 0.019 | 0.002 | 0.545 | 0.001 | 0.320 | ||||
a
p value for joint test of significance (Wald test) (overweight vs. obese).
***
p < 0.001.
All models control for race/ethnicity, socio-economic status, and age. Normal/underweight is the reference group. IM = Initial model; MM = mediation model with body image; CM = complete mediation; NAIM = no association in the initial model.