Table 4

Means and standard deviations for lifestyle behaviors and behavioral determinants
Lifestyle behaviors Group T0 M(sd) T1 M(sd) T2 M(sd)
Vigorous physical activity (min/week) (Questionnaire) I 69.2 (122.1) 56.4 (104.4) 39.4 (125.5)
C 46.0 (123.1) 33.6 (70.4) 22.4 (80.1)
Vigorous physical activity (min/week) (Accelerometer subgroup) I 13.6 (25.8) 8.9 (17.0) 10.4 (19.4)
C 21.8 (45.5) 16.5 (26.4) 21.3 (30.3)
Sedentary behavior at work (min/week) I 2311.3 (870.5) 2233.9 (693.0) 2249.9 (777.5)
C 2295.7 (834.8) 2068.2 (611.0) 2212.8 (779.5)
Fruit intake (servings/day) I 1.9 (1.0) 2.1 (1.0) 2.1 (1.1)
C 1.9 (1.1) 1.9 (1.1) 1.9 (1.0)
Behavioral determinants*
Perceived behavioral control for vigorous physical activity I 2.1 (1.1) 2.4 (1.2) 2.2 (1.1)
C 2.2 (1.3) 2.3 (1.2) 2.2 (1.2)
Eating at least 2 pieces of fruit per day this week is for me* (completely possible – completely impossible) I 1.5 (1.0) 1.5 (1.2) 1.5 (1.1)
C 2.0 (1.5) 1.9 (1.5) 1.6 (1.2)
If I wanted to, I could eat at least 2 pieces of fruit per day this week* (I completely agree- I completely disagree) I 1.4 (1.2) 1.3 (0.8) 1.4 (1.1)
C 1.4 (0.9) 1.4 (1.0) 1.4 (1.0)
How much control do you experience on the amount of fruit you eat this week?* (no control – complete control)** I 1.6 (1.2) 1.7 (1.4) 1.6 (1.2)
C 1.6 (1.3) 1.4 (0.9) 1.7 (1.3)
The extent to which I eat fruit this week is mostly up to me.* (I completely agree- I completely disagree) I 1.8 (1.8) 2.1 (2.1) 1.7 (1.7)
C 1.7 (1.6) 1.9 (2.0) 1.9 (1.8)
Intention for vigorous physical activity I 2.8 (2.0) 3.2 (2.0) 2.8 (2.2)
C 3.2 (2.3) 3.3 (2.3) 3.0 (2.3)
Intention for fruit intake I 2.9 (2.0) 2.7 (2.0) 2.7 (2.0)
C 3.1 (2.2) 3.1 (2.3) 3.1 (2.2)
Perceived barriers for vigorous physical activity** I 2.4 (1.7) 2.5 (1.8) 2.4 (1.7)
C 2.5 (1.8) 2.6 (1.8) 2.4 (1.7)

I= Intervention C=Control, *items were analyzed separately due to unacceptable cronbach’s alpha for the entire scale, **negative items have been recoded for analyses.

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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