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. 2010 Mar 24;35(8):1729–1733. doi: 10.1038/npp.2010.38

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.

a

Genotype defined by the presence or absence of the 7-repeat allele of DRD4.

b

Spring=22 March–21 June; Summer=22 June–21 September; Fall=22 September–21 December; Winter=22 December—21 March.