Table 5

Intervention effects resulting from the primary analyses (linear mixed effect models) and sensitivity analyses (linear regression models) on lifestyle behaviors, and behavioral determinants after 6 (T1) and 12 months (T2), corrected for baseline (T0)
Primary analyses T1 T2
Fixed effects P 95%CI Fixed effects P 95%CI
Lifestyle behaviors
Vigorous physical activity (min/week) (Questionnaire) 17.00 0.11 −3.96-37.96 −5.75 0.71 −35.73-24.23
Vigorous physical activity (min/week) (Accelerometer) −1.07 0.69 −6.35-4.21 −2.93 0.46 −10.86-5.00
Sedentary behavior at work (min/week) −12.87 0.86 −153.01-127.27 −113.45 0.26 −312.77-85.86
Fruit intake (servings/day) 0.03 0.70 −0.13-0.19 −0.02 0.86 −0.25-0.20
Behavioral determinants***
Perceived behavioral control for vigorous physical activity 0.19 0.09 −0.03-0.42 −0.09 0.54 −0.41-0.22
Eating at least 2 pieces of fruit per day this week is for me (completely possible- completely impossible)* 0.01 0.91 −0.24-0.27 0.20 0.27 −0.16-0.56
If I wanted to, I could eat at least 2 pieces of fruit per day this week* −0.09 0.40 −0.31-0.13 0.13 0.39 −0.17-0.45
How much control do you experience on the amount of fruit you eat this week?*,** 0.07 0.64 −0.21-0.35 −0.30 0.14 −0.71-0.10
The extent to which I eat fruit this week is mostly up to me.* 0.30 0.20 −0.16-0.76 −0.27 0.42 −0.92-0.39
Intention for vigorous physical activity 0.29 0.182 −0.13 – 0.71 −0.01 0.96 −0.62-0.59
Intention for fruit intake −0.01 0.94 −0.36-0.34 0.07 0.79 −0.43-0.57
Perceived barriers (lack of time) Physical activity** 0.12 0.70 −0.21-0.45 0.06 0.82 −0.42-0.53
Sensitivity analyses T1 T2
b P 95%CI b P 95% CI
Lifestyle behaviors
Vigorous physical activity (min/week) (Questionnaire) 14.74 0.16 −6.07-35.54 8.28 0.52 −16.90-33.47
Vigorous physical activity (min/week) (Accelerometer) −6.21 0.19 −15.47- 3.06 −8.49 0.10 −18.52 – 1.54
Sedentary behavior at work (min/week) 146.87 0.07 −13.75-307.49 28.75 0.77 −164.33- 221.83
Fruit intake (servings/day) 0.14 0.13 −0.04-0.31 0.15 0.16 −0.06-0.37
Behavioral determinants***
Perceived behavioral control for vigorous physical activity 0.18 0.21 −0.10-0.45 0.10 0.47 −0.16-0.35
Eating at least 2 pieces of fruit per day this week is for me (completely possible- completely impossible)* −0.05 0.77 −0.36-0.26 0.07 0.63 −0.21-0.34
If I wanted to, I could eat at least 2 pieces of fruit per day this week* −0.11 0.37 −0.34-0.13 0.03 0.84 −0.25-0.31
How much control do you experience on the amount of fruit you eat this week?*,** 0.30 0.06 −0.01-0.60 −0.01 0.95 −0.34-0.32
The extent to which I eat fruit this week is mostly up to me.* 0.18 0.51 −0.35-0.71 0.08 0.73 −0.55-0.38
Intention for vigorous physical activity 0.06 0.82 −0.44-0.55 0.08 0.75 −0.40-0.55
Intention for fruit intake −0.36 0.13 −0.82-0.11 −0.30 0.18 −0.75-0.14
Perceived barriers (lack of time)Physical activity** −0.04 0.86 −0.48-0.40 0.02 0.95 −0.39-0.42

CI= Confidence Interval *items were analyzed separately due to unacceptable cronbach’s alpha for the entire scale , **negative items have been recoded for analyses, ***on 7-point Likertscale, with lower scores representing more favorable determinant.

van Berkel et al.

van Berkel et al. International Journal of Behavioral Nutrition and Physical Activity 2014 11:9   doi:10.1186/1479-5868-11-9

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