Table 3. Variability in average activity counts before and after intervention: tailored intervention group only (n=16).
| Covariance parameter estimates | Subject | β | Std. error | Z | p |
|---|---|---|---|---|---|
| Random effects: prediction of activity variability | |||||
| Intercept | ID | 1957.33 | 808.25 | 2.42 | <.01 |
| Residual | ID | 276.52 | 118.67 | 2.33 | .01 |
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| Predictor variables and control variables | β | Std. error | DF | T | p |
|
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| Fixed effects | |||||
| Intercept | 24.52 | 31.5 | 15 | 0.78 | .45 |
| Average activity counts per minute (level 1) | 0.30 | 0.08 | 11 | 3.79 | <.01 |
| Time (baseline = 0, follow-up = 1) (level 1) | −14.09 | 6.52 | 11 | −2.16 | .05 |