Table 2.
Comparison of participants across four study groups created based on once-weekly frequency stipulations.
| BED-ND (n=160) |
BED (n=296) |
BN (n=130) |
NBPO (n=489) |
ANOVA | Covary for BDI | Covary for BMI |
Covary for age, sex, race |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M | sd | M | sd | M | sd | M | sd | F | η 2 | posthoc | F | η 2 | posthoc | η 2 | η 2 | |
| BMI | 31.8 | (9.0) | 34.3 | (10.0) | 29.8 | (9.2) | 37.8 | (6.8) | 43.00 | .108 | acdef | 49.05 | .135 | bcdef | .089 | |
| EDE-Q Restraint |
1.8 | (1.3) | 2.5 | (1.6) | 3.8 | (1.5) | 2.1 | (1.5) | 54.61 | .133 | abdef | 37.70 | .107 | abdef | .120 | .121 |
| EDE-Q Eating Concern |
1.8 | (1.2) | 3.2 | (1.4) | 4.0 | (1.4) | 1.5 | (1.2) | 195.67 | .355 | abdef | 123.15 | .281 | ALL | .361 | .330 |
| EDE-Q Shape Concern |
3.7 | (1.4) | 4.9 | (1.0) | 5.3 | (0.8) | 4.0 | (1.4) | 70.15 | .168 | abdef | 32.12 | .093 | abef | .179 | .143 |
| EDE-Q Weight Concern |
3.2 | (1.3) | 4.3 | (1.1) | 4.7 | (0.9) | 3.4 | (1.3) | 75.49 | .178 | abdef | 33.56 | .096 | abef | .197 | .151 |
| EDE-Q Global | 2.6 | (1.0) | 3.7 | (1.0) | 4.5 | (0.9) | 2.8 | (1.1) | 136.89 | .283 | abdef | 78.35 | .199 | abdef | .286 | .254 |
| OBE | 4.2 | (5.0) | 7.9 | (7.8) | 12.6 | (12.8) | 0.6 | (1.9) | 155.54 | .306 | ALL | 110.88 | .262 | ALL | .294 | .307 |
| BDI | 14.6 | (9.1) | 19.7 | (10.0) | 24.8 | (10.3) | 14.6 | (9.5) | 43.42 | .121 | abdef | .148 | .111 | |||
Note. Note: BED-ND = binge eating disorder – no distress; BED = binge eating disorder; BN = bulimia nervosa; NBPO = no-binge-eating/purging obese comparison group; BMI = body mass index; EDE-Q = eating disorder examination - questionnaire; OBE = objective bulimic episodes determined by EDE-Q; BDI = beck depression inventory.
All F-ratios significant at p<.001. df ranged from (3, 948) to (3,1070).
Posthoc tests (Scheffe for ANOVAs; Bonferroni for ANCOVAs) indicate significant group differences as follows: a: BED-ND vs. BED; b: BED- ND vs. BN; c: BED-ND vs. NBPO; d: BED vs. BN; e: BED vs. NBPO; f: BN vs. NBPO. ALL indicates that all groups significantly differed.