Table 5. Tests of Fixed Effects: Results of Hierarchical Linear Modeling.
| Effect | Numerator df | Denominator df | F value | p value |
| Beverage | 2 | 215 | 7.11 | 0.001 |
| DRD4 | 1 | 395 | 1.41 | 0.237 |
| DRD4×Beverage | 2 | 394 | 3.86 | 0.022 |
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