Table 3 Multilevel logistic random slope model estimated changes in physical activity outcomes, unadjusted and adjusted models*

School commute Active Travel both ways vs. mixture or car travel (reference)Time on study

 0 (baseline)

1640

Ref

Ref

 1 year

879

1.14

0.84, 1.53

0.41

1.188

0.88, 1.61

0.27

 2 years

598

1.03

0.70, 1.53

0.87

1.092

0.73, 1.63

0.67

 3 years

288

0.61

0.33, 1.11

0.10

0.623

0.34, 1.15

0.13

School commute Car Travel both ways vs. mixture or active travel (reference) Time on study

 0 (baseline)

1640

Ref

Ref

 1 year

879

0.74

0.49, 1.13

0.16

0.73

0.49, 1.08

0.11

 2 years

 3 years

598

288

0.48

0.15

0.22, 1.03

0.04, 0.67

0.06

0.01

0.51

0.19

0.26, 0.98

0.06, 0.66

0.04

0.01

Active Play High vs. moderate or low (reference) Time on study

 0 (baseline)

1646

Ref

Ref

 < 0.01

 < 0.01

 1 year

 2 years

879

599

2.04

2.09

1.58, 2.62

1.47, 2.96

 < 0.01

 < 0.01

2.26

2.27

1.74, 2.93

1.60, 3.23

 3 years

288

1.36

0.74, 2.50

0.33

1.56

0.84, 2.89

0.16

Active Play Low vs. moderate or high (reference) Time on study

 0 (baseline)

1646

Ref

Ref

 1 year

879

0.63

0.47, 0.84

 < 0.01

0.59

0.43, 0.81

 < 0.01

 2 years

599

0.56

0.40, 0.80

 < 0.01

0.49

0.26, 0.87

0.02

 3 years

288

0.60

0.38, 0.96

0.03

0.41

0.14, 1.21

0.11

Screen Time Low vs. moderate or high screen time (reference) Time on study

 0 (baseline)

1626

Ref

0.78, 1.18

0.69

Ref

0.83, 1.27

0.79

 1 year

874

0.96

0.11, 0.23

 < 0.01

1.03

0.11, 0.24

 < 0.01

 2 years

598

0.16

0.07, 0.24

< 0.01

0.17

0.08, 0.27

< 0.01

 3 years

288

0.13

0.14

Screen Time High vs. moderate and low screen time (reference) Time on study

 0 (baseline)

1626

Ref

Ref

 1 year

874

1.23

0.94, 1.61

0.13

1.18

0.91, 1.55

0.21

 2 years

598

3.39

2.39, 4.80

 < 0.01

3.21

2.27, 4.54

 < 0.01

 3 years

288

2.48

1.45, 4.24

 < 0.01

2.30

1.36, 3.90

 < 0.01