Table 2.
Full fixed effects structure
| Effects | Description | β | SE | t-value | Cohen's d | P-value |
|---|---|---|---|---|---|---|
| Perceived stress | ||||||
| Group | Intervention or control | 0.110 | 0.64 | 0.17 | 0.03 | .864 |
| Time | Time linear slope | −0.768 | 0.28 | −2.80 | 0.37 | .006* |
| Quadratic time | Time quadratic slope | 0.115 | 0.04 | 2.73 | 0.40 | .007* |
| Group × time | Interaction | -0.716 | 0.28 | -2.61 | 0.34 | .010* |
| Group × quad time | Interaction | 0.105 | 0.04 | 2.48 | 0.36 | .014 |
| Perceived stress: perceived self-efficacy | ||||||
| Group | Intervention or control | 0.349 | 0.31 | 1.13 | 0.18 | .261 |
| Time | Time linear slope | 0.062 | 0.17 | 0.35 | 0.04 | .723 |
| Quadratic time | Time quadratic slope | <0.001 | 0.03 | 0.01 | <0.01 | .989 |
| Group × time | Interaction | -0.467 | 0.17 | -2.69 | 0.32 | .008* |
| Group × quad time | Interaction | 0.068 | 0.03 | 2.48 | 0.29 | .014 |
| Perceived stress: perceived helplessness | ||||||
| Group | Intervention or control | -0.242 | 0.45 | -0.54 | 0.11 | .589 |
| Time | Time linear slope | -0.835 | 0.23 | -3.59 | 0.73 | <.001* |
| Quadratic time | Time quadratic slope | 0.115 | 0.03 | 3.29 | 0.68 | .001* |
| Group × time | Interaction | -0.247 | 0.23 | -1.06 | 0.22 | .290 |
| Group × quad time | Interaction | 0.036 | 0.03 | 1.03 | 0.21 | .304 |
| Caregiver burden | ||||||
| Group | Intervention or control | 0.498 | 1.31 | 0.38 | 0.07 | .704 |
| FAST baseline | Baseline dementia stage | 3.351 | 1.02 | 3.27 | 0.66 | .001* |
| Time | Time linear slope | -1.455 | 0.53 | -2.75 | 0.37 | .006* |
| Quadratic time | Time quadratic slope | 0.214 | 0.08 | 2.62 | 0.39 | .010* |
| Group × time | Interaction | -0.448 | 0.53 | -0.85 | 0.11 | .397 |
| Group × quad time | Interaction | 0.070 | 0.08 | 0.85 | 0.13 | .394 |
| Depression | ||||||
| Group | Intervention or control | 0.260 | 0.75 | 0.35 | 0.06 | .729 |
| Time | Time linear slope | -1.064 | 0.37 | -2.85 | 0.39 | .005* |
| Quadratic time | Time quadratic slope | 0.145 | 0.06 | 2.50 | 0.38 | .014 |
| Group × time | Interaction | -.414 | 0.37 | -1.11 | 0.15 | .269 |
| Group × quad time | Interaction | .053 | 0.06 | 0.90 | 0.14 | .367 |
| Anxiety | ||||||
| Group | Intervention or control | 0.572 | 0.75 | 0.76 | 0.15 | .447 |
| Time | Time linear slope | -1.010 | 0.39 | -2.60 | 0.53 | .011* |
| Quadratic time | Time quadratic slope | 0.163 | 0.06 | 2.71 | 0.58 | .008* |
| Group × time | Interaction | -0.154 | 0.39 | -0.40 | 0.08 | .693 |
| Group × quad time | Interaction | 0.027 | 0.06 | 0.45 | 0.10 | .651 |
NOTE: Group × time = interaction between group and the linear slope of time. Group × quad time = interaction between group and the quadratic slope of time. The interaction terms (in bold) indicate potential effects of the intervention over time. * indicates significant at α = .0125.