Table 1.
Parameter estimates and inferential statistics for the growth models
| Model: BMI 1 | Estimate | S.E. | Est./S.E. | P-Value |
|---|---|---|---|---|
| Covariances | ||||
| Slope 1 with Intercept | −0.38 | 0.12 | −3.21 | 0.001 |
| Slope 2 with Intercept | 0.04 | 0.06 | 0.70 | 0.48 |
| Slope 1 with Slope 2 | 0.02 | 0.006 | 2.98 | 0.003 |
| Means | ||||
| Intercept | 34.92 | 0.30 | 115.49 | <0.001 |
| Slope 1 | −0.65 | 0.03 | −24.57 | <0.001 |
| Slope 2 | 0.04 | 0.01 | 2.90 | 0.004 |
| Variances | ||||
| Intercept | 18.05 | 1.45 | 12.44 | <0.001 |
| Slope 1 | 0.11 | 0.02 | 6.21 | <0.001 |
| Slope 2 | 0.02 | 0.006 | 3.66 | <0.001 |
| Residual Variances | ||||
| BMI 0, 6, 12, and 18 | 0.60 | 0.08 | 7.90 | <0.001 |
|
| ||||
| Model: BMI 2 | Estimate | S.E. | Est./S.E. | P-Value |
|
| ||||
| Covariances | ||||
| Slope 1 with Intercept | −0.48 | 0.14 | −3.45 | 0.001 |
| Slope 2 with Intercept | 0.04 | 0.06 | 0.71 | 0.48 |
| Slope 1 with Slope 2 | 0.01 | 0.01 | 0.63 | 0.53 |
| Means | ||||
| Intercept | 34.92 | 0.30 | 115.49 | <0.001 |
| Slope 1 | −0.64 | 0.03 | −22.45 | <0.001 |
| Slope 2 | 0.04 | 0.01 | 2.81 | 0.01 |
| Variances | ||||
| Intercept | 18.61 | 1.54 | 12.06 | <0.001 |
| Slope 1 | 0.13 | 0.03 | 4.78 | <0.001 |
| Slope 2 | 0.03 | 0.01 | 2.49 | 0.01 |
| Residual Variances | ||||
| BMI 0, 6, and 18 | 0.04 | 0.56 | 0.07 | 0.94 |
| BMI12B | 0.89 | 0.22 | 4.10 | 0.00 |
|
| ||||
| Model: BMI Change Baseline to 18 months | Estimate | S.E. | Est./S.E. | P-Value |
|
| ||||
| Covariances | ||||
| Slope with intercept | −0.14 | 0.06 | −2.27 | 0.02 |
| Means | ||||
| Intercept | 34.92 | 0.30 | 115.49 | <0.001 |
| Slope | −0.20 | 0.01 | −15.97 | <0.001 |
| Variances | ||||
| Intercept | 18.65 | 1.46 | 12.75 | <0.001 |
| Slope 1 | ||||
| Residual Variances | ||||
| BMI 0 and 18 (fixed to zero) | 0 | N/A | N/A | N/A |
|
| ||||
| Model: Reinforcement Ratio (RR) | Estimate | S.E. | Est./S.E. | P-Value |
|
| ||||
| Covariances | ||||
| Slope 1 with intercept | <0.001 | <0.001 | −2.36 | 0.02 |
| Slope 2 with Intercept | <0.001 | <0.001 | 2.62 | 0.01 |
| Slope 1 with Slope 2 | <0.001 | <0.001 | −3.22 | 0.001 |
| Means | ||||
| Intercept | 0.38 | 0.01 | 53.27 | <0.001 |
| Slope 1 | −0.01 | 0.001 | −9.33 | <0.001 |
| Slope 2 | 0.001 | 0.001 | 2.67 | 0.01 |
| Variances | ||||
| Intercept | 0.01 | 0.001 | 6.10 | <0.001 |
| Slope 1 | <0.001 | <0.001 | 3.24 | 0.001 |
| Slope 2 | <0.001 | <0.001 | 10.74 | <0.001 |
| Residual Variances | ||||
| RR 0, 6, 12, and 18 | 0.004 | 0.000 | 46.870 | <0.001 |
|
| ||||
| Model: Food Related Reinforcement (FRR) | Estimate | S.E. | Est./S.E. | P-Value |
|
| ||||
| Covariances | ||||
| Slope 1 with Intercept | −0.04 | 0.02 | −1.85 | 0.10 |
| Slope 2 with Intercept | 0.01 | 0.01 | 1.20 | 0.23 |
| Slope 1 with Slope 2 | −0.003 | 0.003 | −0.98 | 0.33 |
| Means | ||||
| Intercept | 2.48 | 0.08 | 32.45 | <0.001 |
| Slope 1 | −0.08 | 0.01 | −6.18 | <0.001 |
| Slope 2 | 0.01 | 0.01 | 1.88 | 0.06 |
| Variances | ||||
| Intercept | 0.87 | 0.14 | 6.23 | <0.001 |
| Slope 1 | 0.01 | 0.01 | 2.12 | 0.03 |
| Slope 2 | 0.002 | 0.002 | 1.19 | 0.24 |
| Residual Variances | ||||
| FRR 0, 6, 12, and 18 | 0.30 | 0.03 | 8.40 | <0.001 |
|
| ||||
| Model: FRR 2 | Estimate | S.E. | Est./S.E. | P-Value |
|
| ||||
| Covariances | ||||
| Slope 1 with Intercept | −0.02 | 0.02 | −0.78 | 0.43 |
| Means | ||||
| Intercept | 2.48 | 0.08 | 32.46 | <0.001 |
| Slope 1 | −0.08 | 0.01 | −6.03 | <0.001 |
| Slope 2 | 0.01 | 0.01 | 1.76 | 0.08 |
| Variances | ||||
| Intercept | 0.81 | 0.15 | 5.36 | <0.001 |
| Slope 1 | 0.01 | 0.003 | 2.22 | 0.027 |
| Slope 2 | 0.00 | 0.00 | n/a | n/a |
| Residual Variances | ||||
| FRR 0, 6, 12, and 18 | 0.36 | 0.06 | 5.71 | 0.000 |
|
| ||||
| Model: Food-Free Reinforcement (FFR) | Estimate | S.E. | Est./S.E. | P-Value |
|
| ||||
| Covariances | ||||
| Slope 1 with Intercept | −0.05 | 0.04 | −1.37 | 0.17 |
| Slope 2 with Intercept | 0.01 | 0.01 | 0.73 | 0.47 |
| Slope 1 with Slope 2 | −0.001 | 0.004 | −0.24 | 0.81 |
| Means | ||||
| Intercept | 4.03 | 0.10 | 40.78 | <0.001 |
| Slope 1 | 0.08 | 0.017 | 4.73 | <0.001 |
| Slope 2 | −0.01 | 0.007 | −1.33 | 0.19 |
| Variances | ||||
| Intercept | 1.30 | 0.243 | 5.35 | <0.001 |
| Slope 1 | 0.02 | 0.009 | 1.80 | 0.07 |
| Slope 2 | 0.001 | 0.002 | 0.33 | 0.74 |
| Residual Variances | ||||
| FFR 0, 6, 12, and 18 mo | 0.68 | 0.09 | 7.66 | <0.001 |
|
| ||||
| Model: FFR 2 | Estimate | S.E. | Est./S.E. | P-Value |
|
| ||||
| Covariances | ||||
| Slope 1 with Intercept | −0.04 | 0.03 | −1.15 | 0.25 |
| Means | ||||
| Intercept | 4.02 | 0.10 | 40.68 | <0.001 |
| Slope 1 | 0.08 | 0.02 | 4.70 | <0.001 |
| Slope 2 | −0.01 | 0.01 | −1.29 | 0.20 |
| Variances | ||||
| Intercept | 1.29 | 0.24 | 5.27 | <0.001 |
| Slope 1 | 0.02 | 0.01 | 2.38 | 0.02 |
| Slope 2 (fixed at 0) | 0.00 | 0.00 | N/A | N/A |
| Residual Variances | ||||
| FFR 0, 6, 12, and 18 mo | 0.70 | 0.09 | 8.25 | <0.001 |
Note. FFR = food-free reinforcement; FRR = food related reinforcement; Slope 1 = change from 0 to 6 months; slope 2 = change from 6 to 18 months; intercept = baseline value.