Table 1. General Linear Model Predicting Maximum Lifetime Body Mass Index (BMI) with DRD4 Genotype, Birth Season, and Past History of Anorexia Nervosa (AN), Co-varied by Age at Maximal BMI in 188 Women with Bulimia Nervosa.
df | F | p-value | Partial η2 | Power | |
---|---|---|---|---|---|
Overall model | 16 | 5.56 | <0.0001 | 0.342 | 1.00 |
Source | |||||
Age at maximal BMI | 1 | 46.44 | <0.0001 | 0.214 | 1.00 |
DRD4 genotypea | 1 | 7.39 | 0.007 | 0.041 | 0.77 |
Birth seasonb | 3 | 3.20 | 0.025 | 0.053 | 0.73 |
Past AN | 1 | 5.81 | 0.017 | 0.033 | 0.67 |
DRD4 × birth season | 3 | 2.92 | 0.036 | 0.049 | 0.69 |
DRD4 × past AN | 1 | 0.11 | 0.743 | 0.001 | 0.06 |
Birth season × past AN | 3 | 2.08 | 0.105 | 0.035 | 0.53 |
DRD4 × birth season × past AN | 3 | 1.94 | 0.125 | 0.033 | 0.50 |
Error | 171 | ||||
Total | 188 |
Abbreviation: df, degrees of freedom.
Genotype defined by the presence or absence of the 7-repeat allele of DRD4.
Spring=22 March–21 June; Summer=22 June–21 September; Fall=22 September–21 December; Winter=22 December—21 March.