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FIT-SAT treatment efficiency: best fit mixed-effect models (bilateral smile, % left vs. right side).
| Parameters | Model | df | AIC | BIC | LogLik | Test | L. ratio | p value |
|---|---|---|---|---|---|---|---|---|
| % left/right side | m0 | 2 | 2678.1 | 2686.7 | -1337.0 | |||
| m1 | 3 | 2440.9 | 2453.8 | -1217.4 | m0 vs. m1 | 239.2 | <0.0001 | |
| m2 | 4 | 2418.3 | 2435.6 | -1205.2 | m1 vs. m2 | 24.6 | <0.0001 | |
| m3 | 7 | 2397.6 | 2419.2 | -1193.8 | m2 vs. m3 | 22.7 | <0.0001 | |
| m4 | 10 | 2238.3 | 2264.2 | -1113.1 | m3 vs. m4 | 161.3 | <0.0001 |
