Table 3.
Analyses of covariance pairwise comparisons adjusting for age, sex, education, and body mass index.
| Black n=121 | Hispanic n=54 | White n=580 | Omnibus ANCOVA (age, sex, edu) | Omnibus ANCOVA (age, sex, edu, BMI) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M | SE | M | SE | M | SE | F | Total df | p | ηp2 | p | ηp2 | |
| BMI | 40.12c | 0.61 | 38.60 | 0.92 | 37.68a | 0.28 | 9.06 | 747 | <.001 | .058 | N/A | N/A |
| Episodes | ||||||||||||
| OBE | 21.55b,c | 1.18 | 16.65a* | 1.76 | 17.85a | 0.54 | 2.09 | 750 | .065 | .014 | .102 | .014 |
| SBE | 8.92 | 1.16 | 8.30 | 1.73 | 7.25 | 0.53 | 2.50 | 750 | .029 | .017 | .049 | .017 |
| OOE | 3.54 | 0.74 | 3.11 | 1.12 | 3.67 | 0.34 | 1.30 | 749 | .263 | .009 | .280 | .010 |
| EDE Global Score | 2.65 | 0.08 | 2.90 | 0.12 | 2.73 | 0.04 | 8.17 | 751 | <.001 | .052 | <.001 | .053 |
| Restraint | 1.80 | 0.12 | 2.14 | 0.18 | 1.83 | 0.06 | 2.57 | 751 | .026 | .017 | .001 | .029 |
| Eating | 1.91 | 0.12 | 2.25 | 0.18 | 2.12 | 0.06 | 5.73 | 751 | <.001 | .037 | <.001 | .039 |
| Shape | 3.66 | 0.10 | 3.93 | 0.16 | 3.70 | 0.05 | 7.59 | 751 | <.001 | .048 | <.001 | .050 |
| Weight | 3.22 | 0.09 | 3.28 | 0.14 | 3.26 | 0.04 | 6.85 | 751 | <.001 | .012 | <.001 | .044 |
| BDI | 13.65b,c | 0.81 | 17.60a | 1.22 | 16.70a | 0.37 | 9.23 | 746 | <.001 | .059 | <.001 | .060 |
| Age of Onset | ||||||||||||
| Obesity | 20.50c | 0.99 | 20.70c | 1.49 | 16.35a,b | 0.44 | 10.12 | 683 | <.001 | .070 | <.001 | .127 |
| Dieting | 25.68c | 0.95 | 25.55c | 1.39 | 20.87a,b | 0.40 | 17.00 | 621 | <.001 | .121 | <.001 | .145 |
| Binge Eating | 27.21c | 1.14 | 25.87c | 1.68 | 22.23a,b | 0.51 | 19.39 | 666 | <.001 | .128 | <.001 | .137 |
| BED | 28.49 | 1.19 | 27.34 | 1.78 | 26.47 | 0.55 | 20.08 | 688 | <.001 | .128 | <.001 | .130 |
Note. Subscripts denote significant differences at the p<.05 level compared with a=Black participants, b=Hispanic participants, c=White participants. Omitted subscripts indicate nonsignificant pairwise comparisons. Partial eta squared (ηp2) values are considered small at .01, medium at .06, and large at .14 (Cohen, 1988). OBE, SBE, and OOE variables were square root-transformed for ANCOVAs to meet assumptions of normality. However, we report non-transformed means here to facilitate interpretation. The education variable (edu) included five levels of education. BMI=Body Mass Index; OBE=Objective bulimic episode; SBE=Subjective bulimic episode; OOE=Objective overeating episode; EDE=Eating Disorder Examination; BDI=Beck Depression Inventory; BED=Binge eating disorder.
This pairwise comparison became non-significant when BMI was added to the ANCOVA. All other comparisons maintained the same significance pattern.