Table 3.
Linear models for predictors of sugar-sweetened beveragea (SSB) consumption from the Theory of Planned Behavior (TPB) constructs in adolescents (panel A) and parents (panel B) with 95% bias corrected and accelerated confidence intervals (95% BCa) and statistically significant interactions from the moderator analysis of the Parent Response to Beverage Choice Questionnaire on adolescent TPB constructs and SSBa intake (panel C). Confidence intervals and standard errors for linear models are based on 1000 bootstrap samples.
| A. Adolescents | |||||
|---|---|---|---|---|---|
| Predictor Variable |
R2
(Adj R2) |
Final Model b (95% BCa) |
Final Model SE B |
Final Model β |
F |
| Step 1 Intention | 0.13 | −37* | 16 | −0.27 | 14.65*** |
| (0.12) | (−70, −7) | ||||
| Step 2 Perceived behavioral control |
0.14 | 16 | 20 | 0.09 | 7.99*** |
| (0.12) | (−24, 57) | ||||
| Step 3 Subjective norms | 0.16 | −15 | 20 | −0.10 | 4.43** |
| (0.12) | (−52, 28) | ||||
| Step 3 Attitude | 0.16 | −3 | 18 | −0.01 | 4.43** |
| (0.12) | (−36, 35) | ||||
| Step 4 Gender | 0.22 | −49* | 22 | −0.22 | 3.77*** |
| (0.16) | (−90, −10) | ||||
| Step 4 Age | 0.22 | 9 | 6 | −.15 | 3.77*** |
| (0.16) | (−4, 21) | ||||
| Step 4 BMI percentile | 0.22 | 0 | 0 | 0.02 | 3.77*** |
| (0.16) | (−1, 1) | ||||
| B. Parents | |||||
| Predictor Variable |
R2
(Adj
R2) |
Final
Model b (95% CI) |
Final Model
SE B |
Final Model
β |
F |
| Step 1 Intention | 0.33 | −49** | 14 | −0.63 | 31.43*** |
| (0.32) | (−75, −17) | ||||
| Step 2 Perceived behavioral control |
0.34 | 17 | 31 | 0.08 | 15.72** |
| (0.32) | (−47, 68) | ||||
| Step 3 Subjective norms | 0.36 | −7 | 12 | 0.06 | 8.25** |
| (0.31) | (−14, 30) | ||||
| Step 3 Attitude | 0.36 | 11 | 10 | 0.10 | 8.25** |
| (0.31) | (−11, 31) | ||||
| Step 4 Gender | 0.38 | −41 | 56 | −0.11 | 5.03*** |
| (0.31) | (−154, 60) | ||||
| Step 4 Age | 0.38 | −1 | 2 | −0.02 | 5.03*** |
| (0.31) | (−6, 7) | ||||
| Step 4 BMIb | 0.38 | 3 | 4 | 0.13 | 5.03*** |
| (0.31) | (−4, 7) | ||||
|
C. Moderation
Analysis |
R2 |
b
(95% CI) |
SE B | F | |
| Main effect: Adolescent intention |
--- | −80** | 16 | ||
| (−112, −48) | |||||
| Main effect: Parent encouragement of SSBa overall |
--- | 17 | 16 | ||
| (−14, 48) | |||||
| Interaction: Parent encouragement of SSBa overall X adolescent intention |
0.34 | −43* | 18 | 10.98** | |
| (−80, −7) | |||||
| Main effect: Adolescent intention |
--- | -81** | 14 | ||
| (−109, −54) | |||||
| Main effect: Parent encouragement of SSBa outside of home |
--- | 26* | 13 | ||
| (−0, 51) | |||||
| Interaction: Parent encouragement of SSBa outside the home X adolescent intention |
0.40 | −55** | 14 | 14.22** | |
| (−83, −28) | |||||
a
Sugar-sweetened beverages include regular soft drinks, juice drinks, sweetened tea, coffee/tea with cream and/or sugar, mixed alcoholic drinks, and energy and sports drinks.30
b
Body mass index
*
p≤0.05
**
p≤0.01
***
p≤0.001