Table 1.
Mixed models associated with walking.
| Predictor variable | Step 4 | Step 5 | ||
| Fixed effects | B (SE) | t | B (SE) | T |
| Within-person | ||||
| Linear timea | <0.00 (0.00) | 2.07 | 0.01 (0.00) | 2.16 |
| Imp intcentered | 1.13 (0.25) | 4.61** | 0.80 (0.25) | 3.26** |
| Soc supcentered | 0.56 (0.11) | 4.87*** | 0.44 (0.11) | 3.86** |
| Pos affectcentered | 0.13 (0.05) | 2.84* | 0.08 (0.04) | 1.84 |
| Neg affectcentered | −0.01 (0.06) | −0.14 | −0.00 (0.06) | −0.03 |
| Sup envcentered | n/a | n/a | 0.38 (0.09) | 4.17** |
| Env barrcentered | n/a | n/a | 0.17 (0.18) | 0.90 |
| Random effects | var (SE) | Z | var (SE) | Z |
| Residual | 1.70 (0.09) | 19.37*** | 1.56 (0.08)*** | 15.3 |
| Linear timea | 0.00 (0.00) | 0.84 | 0.00 (0.00) | 0.68 |
| Imp intcentered | 0.31 (0.29) | 1.05 | 0.28 (0.24) | 1.17 |
| Soc supcentered | 0.00 (0.00) | 0 | 0.00 (0.00) | 0.00 |
| Pos affectcentered | 0.00 (0.00) | 0.09 | 0.00 (0.00) | 0.00 |
| Neg affectcentered | 0.00 (0.00) | 0 | 0.00 (0.00) | 0.00 |
| Sup envcentered | n/a | n/a | 0.05 (0.04) | 1.4 |
| Env barrcentered | n/a | n/a | 0.00 (0.00) | 0.00 |
| Within pseudo R2 | 0.17 | 0.24 | ||
| UMM | Step 4 | UMM | Step 5 | |
| −2 Log likelihood | 2890.5 | 2743.6 | 2890.5 | 2678.6 |
| AIC | 2896.5 | 2773.6 | 2896.5 | 2718.6 |
| BIC | 2898.4 | 2783.2 | 2898.4 | 2731.4 |
Notes: Nentries = 804; Imp int = implementation intentions; Soc sup = social support; Pos affect= positive affect; Neg affect = negative affect; Sup env = supportive environment; Env barr = environmental barriers.
a
Quadratic and cubic time predictors were nonsignificant and thus dropped.
The above analyses included between-person associations to control for differences between individuals at baseline. As this study included only 14 individuals, between-subject analyses were not readily interpretable and thus were not reported.
*
p < 0.05
**
p < 0.01
***
p < 0.001.