| Model 1a | Model 2a | Model 3a | Model 4a | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
AOR | 95Â % CI | AOR | 95Â % CI | AOR | 95Â % CI | AOR | 95Â % CI | |||||
Wave | ||||||||||||
 2 | Ref |  |  | Ref |  |  | Ref |  |  | Ref |  |  |
 3 | 1.04 | 0.88 | 1.23 | 0.93 | 0.70 | 1.23 | 1.05 | 0.77 | 1.42 | 0.86 | 0.60 | 1.25 |
 4 | 0.96 | 0.78 | 1.18 | 0.97 | 0.74 | 1.26 | 0.80 | 0.60 | 1.07 | 1.04 | 0.73 | 1.48 |
Variables in previous wave | ||||||||||||
 Five closest friends PA | 1.17*** | 1.09 | 1.27 | 1.18*** | 1.09 | 1.27 | 1.17*** | 1.08 | 1.27 | 1.17*** | 1.08 | 1.26 |
 VPA planning | 1.23*** | 1.14 | 1.32 | 1.22*** | 1.14 | 1.32 | 1.23*** | 1.14 | 1.33 | 1.22*** | 1.13 | 1.32 |
 Body mass index | 0.99 | 0.98 | 1.00 | 0.99†| 0.97 | 1.00 | 0.99 | 0.98 | 1.00 | 0.99 | 0.98 | 1.00 |
 Parent support to PA | 1.08** | 1.02 | 1.14 | 1.08*** | 1.03 | 1.14 | 1.07*** | 1.02 | 1.13 | 1.08** | 1.02 | 1.13 |
 VPA ≥ 2 hours a week | ||||||||||||
  No | Ref |  |  | Ref |  |  | Ref |  |  | Ref |  |  |
  Yes | 2.43*** | 1.81 | 3.27 | 2.44*** | 1.82 | 3.27 | 2.42*** | 1.80 | 3.25 | 2.40*** | 1.79 | 3.22 |
Interaction of wave 4 × environmental status | ||||||||||||
 Work status | ||||||||||||
  W4 × Not working | – | – | – | Ref |  |  | – | – | – | – | – | – |
  W4 × Work part time <30 hours | – | – | – | 0.92 | 0.64 | 1.32 | – | – | – | – | – | – |
  W4 × Work full time ≥30 hours | – | – | – | 1.29 | 0.78 | 2.14 | – | – | – | – | – | – |
 School status | ||||||||||||
  W4 × College/Graduate School | – | – | – | – | – | – | Ref |  |  | – | – | – |
  W4 × Not attending school | – | – | – | – | – | – | 1.11 | 0.75 | 1.65 | – | – | – |
  W4 × Tech/Vocational School/Community College | – | – | – | – | – | – | 1.13 | 0.75 | 1.70 | – | – | – |
Residence at W4 | ||||||||||||
  W4 × On campus | – | – | – | – | – | – | – | – | – | Ref |  |  |
  W4 × At home | – | – | – | – | – | – | – | – | – | 0.80 | 0.43 | 1.47 |
  W4 × In own place | – | – | – | – | – | – | – | – | – | 0.89 | 0.61 | 1.30 |