Table 4.
Generalized estimating equations examining predictors of total activity time following EMA recordings (N=17)
| 30 minutes after EMA | 60 minutes after EMA | 120 minutes after EMA | |||||||
|---|---|---|---|---|---|---|---|---|---|
| B | SE | p | B | SE | p | B | SE | p | |
| Intercept | 16.83 | 0.46 | 0.000 | −72.75 | 24.76 | 0.003 | −47.90 | 26.76 | 0.073 |
| Wear time | 0.56 | 0.01 | 0.000 | 1.77 | 0.42 | 0.000 | 0.94 | 0.23 | 0.000 |
| zBMI | −3.65 | 0.75 | 0.000 | −9.40 | 1.62 | 0.000 | −18.10 | 4.68 | 0.000 |
| Age | −1.35 | 0.21 | 0.000 | −2.10 | 0.58 | 0.000 | −2.64 | 1.99 | 0.186 |
| LOC eating (between) | −0.78 | 0.21 | 0.000 | −1.48 | 0.39 | 0.000 | −1.63 | 1.29 | 0.207 |
| LOC eating (within) | −0.59 | 0.38 | 0.124 | −1.36 | 0.46 | 0.003 | −2.83 | 0.82 | 0.001 |
| Intercept | 16.77 | 0.46 | 0.000 | −76.65 | 22.39 | 0.001 | −49.13 | 28.59 | 0.086 |
| Wear time | 0.56 | 0.72 | 0.000 | 1.84 | 0.37 | 0.000 | 0.95 | 0.25 | 0.000 |
| zBMI | −3.79 | 0.72 | 0.000 | −9.67 | 1.66 | 0.000 | −18.59 | 4.78 | 0.000 |
| Age | −1.34 | 0.24 | 0.000 | −2.08 | 0.65 | 0.001 | −2.27 | 2.02 | 0.261 |
| Overeating (between) | −2.37 | 0.71 | 0.001 | −4.39 | 1.40 | 0.002 | −2.91 | 3.92 | 0.457 |
| Overeating (within) | −0.74 | 1.41 | 0.601 | −2.38 | 2.65 | 0.370 | −4.81 | 4.65 | 0.301 |
| Intercept | −29.06 | 6.42 | 0.000 | −75.46 | 15.26 | 0.000 | −69.66 | 28.86 | 0.016 |
| Wear time | 1.53 | 0.21 | 0.000 | 1.82 | 0.26 | 0.000 | 1.14 | 0.24 | 0.000 |
| zBMI | −3.36 | 1.07 | 0.002 | −7.58 | 1.98 | 0.000 | −14.05 | 3.02 | 0.000 |
| Age | −1.08 | 0.31 | 0.001 | −2.19 | 0.45 | 0.000 | −4.16 | 0.56 | 0.000 |
| Hunger (between) | −1.48 | 0.67 | 0.026 | −3.68 | 1.25 | 0.003 | −7.83 | 2.13 | 0.000 |
| Hunger (within) | 0.42 | 0.35 | 0.240 | 1.19 | 0.89 | 0.185 | 3.27 | 1.81 | 0.072 |
| Intercept | −26.32 | 4.72 | 0.000 | −78.89 | 14.93 | 0.000 | −78.56 | 25.95 | 0.002 |
| Wear time | 1.42 | 0.17 | 0.000 | 1.86 | 0.25 | 0.000 | 1.20 | 0.22 | 0.000 |
| zBMI | −3.94 | 0.91 | 0.000 | −9.05 | 1.60 | 0.000 | −17.41 | 3.02 | 0.000 |
| Age | −0.89 | 0.39 | 0.022 | −1.73 | 0.68 | 0.012 | −3.27 | 1.00 | 0.001 |
| NA (between) | −0.51 | 0.48 | 0.287 | −1.45 | 0.89 | 0.105 | −3.67 | 1.43 | 0.010 |
| NA (within) | −0.34 | 0.23 | 0.127 | −0.71 | 0.39 | 0.069 | −1.66 | 0.58 | 0.004 |
| Intercept | −28.29 | 4.97 | 0.000 | −76.65 | 18.28 | 0.000 | −85.89 | 28.29 | 0.002 |
| Wear time | 1.48 | 0.17 | 0.000 | 1.81 | 0.31 | 0.000 | 1.24 | 0.24 | 0.000 |
| zBMI | −3.53 | 1.07 | 0.001 | −7.88 | 2.04 | 0.000 | −14.37 | 2.78 | 0.000 |
| Age | −0.42 | 0.55 | 0.447 | −0.50 | 0.95 | 0.598 | −0.17 | 1.12 | 0.878 |
| PA (between) | 0.09 | 0.05 | 0.057 | 0.23 | 0.08 | 0.006 | 0.59 | 0.10 | 0.000 |
| PA (within) | 0.24 | 0.08 | 0.002 | 0.51 | 0.16 | 0.001 | 0.87 | 0.25 | 0.001 |
Note. EMA=ecological momentary assessment; zBMI= body mass index z-score; PA=positive affect; NA=negative affect; LOC=loss of control; between=grand-mean centered variable; within=person-mean centered variable. Physical activity was assessed in the 30/60/120 minutes following ratings of LOC, overeating, hunger, PA and NA. Wear time was the total valid wear time within each specified time window (30/60/120 minutes).