Table 2.
Comparison of random coefficient models in the full sample (N = 160) to characterize the trajectory of desired weight percentage, weight difference percentage, eating disorder severity, and BMI from admission to 12-months post-discharge.
| Desired Weight Percentage | ||
|---|---|---|
| Linear | Quadratic | |
| Model | AIC | AIC |
| Random Intercept | 3674.07 | 3658.52 |
| Random Slope | 3911.02 | 3963.68 |
| Random Intercept, Random Slope | 3910.69 | 3963.68 |
| Weight Difference Percentage | ||
| Linear | Quadratic | |
| Model | AIC | AIC |
| Random Intercept | 3918.14 | 3895.99 |
| Random Slope | 4074.88 | 4076.68 |
| Random Intercept, Random Slope | 4074.79 | 4076.68 |
| Eating Disorder Severity (EDE Global) | ||
| Linear | Quadratic | |
| Model | AIC | AIC |
| Random Intercept | 2047.23 | 2046.81 |
| Random Slope | 2475.20 | 2540.90 |
| Random Intercept, Random Slope | 2474.64 | 2541.12 |
| Body Mass Index | ||
| Linear | Quadratic | |
| Model | AIC | AIC |
| Random Intercept | 2822.14 | 2768.58 |
| Random Slope | 2903.10 | 2944.02 |
| Random Intercept, Random Slope | 2902.74 | 2944.02 |
Notes. BMI = body mass index; AIC = Akaike Information Criterion (smaller AIC values indicate better fit to the data). Bold values indicate the best fitting model. The difference in AIC values for the linear and quadratic random intercept model for EDE global score was minimal (2047.23 vs. 2046.81), and the quadratic term was not statistically significant. Thus, the linear model was determined to be a better fit for EDE global score.