Table 6.
Multivariate linear regression—as-treated analysis. Each line starting with a dependent variable contains information from one regression analysis (N=571) and provides model fit (R 2), results for the variables occasional website usage and frequent website usage (regardless of significance), and those variables which were demonstrated to be significant independent predictors in the model.
| Dependent variable | R 2 | Occasional website usage | Frequent website usage | Further independent predictors | |||||
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B (95% CI) | β | B (95% CI) | β | Variable | B (95% CI) | β | |
| Physical activity |
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Frequency of doing exercise, Δ (t2–t1) | .42 | –0.13 (–0.74, 0.49) | –.01 | 0.28 (–0.36, 0.92) | .03 | Indication | 0.63 (0.13, 1.14) | .10 |
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Age | –0.41 (–0.66, –0.15) | –.11 |
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Baseline behavior | –0.70 (–0.77, –0.62) | –.63 |
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Improvements in physical activity frequency | .06 | –0.005 (–0.23, 0.22) | –.002 | 0.21 (–0.03, 0.45) | .07 | Age | –0.18 (0.28, 0.09) | –.17 |
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Income | 0.04 (0.01, 0.07) | .13 |
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Improvements in physical activity regularity | .06 | 0.12 (–0.12, 0.36) | .04 | 0.27 (0.02, 0.51) | .09 | Indication | 0.21 (0.01, 0.41) | .11 |
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Age | –0.18 (–0.28, –0.08) | –.16 |
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Baseline behavior | –0.03 (–0.06, 0.00) | –.09 |
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Improvements in physical activity in daily routine | .07 | 0.06 (–0.17, 0.30) | .02 | 0.39 (0.14, 0.63) | .13 | Age | –0.13 (–0.23, –0.03) | –.12 |
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Education | –0.27 (–0.46, –0.09) | –.13 |
| Eating behavior |
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Attention paid, a healthy diet, Δ (t2–t1) | .43 | –0.14 (–0.59, 0.31) | –.02 | 0.73 (0.26, 1.21) | .10 | Baseline behavior | –0.64 (–0.71, –0.58) | –.66 |
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Improvements in eating more healthy foods | .09 | –0.06 (–0.28, 0.17) | –.02 | 0.36 (0.12, 0.59) | .12 | BMI | 0.03 (0.02, 0.05) | .19 |
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Baseline behavior | –0.04 (–0.07, 0.00) | –.10 |
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Improvements in eating less unhealthy foods | .10 | 0.04 (–0.20, 0.27) | .01 | 0.32 (0.08, 0.56) | .11 | Indication | 0.29 (0.10, 0.48) | .15 |
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BMI | 0.03 (0.02, 0.05) | .17 |
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Improvements in eating smaller portions | .10 | 0.03 (–0.20, 0.25) | .01 | 0.28 (0.05, 0.51) | .10 | BMI | 0.05 (0.03, 0.06) | .28 |
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Improvements in using less fat for cooking | .08 | 0.02 (–0.21, 0.25) | .01 | 0.40 (0.17, 0.64) | .14 | Indication | 0.20 (0.01, 0.39) | .11 |
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Education | –0.21 (–0.39, –0.03) | –.10 |
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BMI | 0.03 (0.02, 0.05) | .18 |