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)

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