Table 1.
Demographic characteristics 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 |
Test Statistic | P value | Effect size |
|
|---|---|---|---|---|---|---|---|
| Age, mean (SD) a | 35.6 (12.6) | 35.8 (12.2) | 32.1 (10.5) | 38.5 (12.3) | F(3, 927)=9.22 | <.001 | .029 |
| Female, No (%) | 123 (76.9%) | 262 (88.8%) | 123 (95.3%) | 418 (85.7%) | χ2 (3, n=1072)=22.81 | <.001 | .146 |
| Ethnicity, No (%) b | |||||||
| Caucasian | 128 (80.0%) | 251 (85.4%) | 97 (75.2%) | 372 (76.4%) | χ2 (3, n=1075)=10.07 | .018 | .097 |
| African-American | 8 (5.0%) | 8 (2.7%) | 7 (5.4%) | 51 (10.5%) | |||
| Hispanic | 9 (5.6%) | 17 (5.8%) | 17 (13.2%) | 27 (5.5%) | |||
| Asian | 11 (6.9%) | 11 (3.7%) | 4 (3.1%) | 13 (2.7%) | |||
| Other | 4 (2.5%) | 7 (2.4%) | 4 (3.1%) | 24 (4.9%) |
Note: BED-ND = binge eating disorder – no distress (i.e., no marked distress criterion); BED = binge eating disorder; BN = bulimia nervosa; NBPO = no-binge-eating/purging obese comparison group
a
Posthoc Scheffe test found that NBO significantly differs from BN and BED. There were no other group differences.
b
Specific group comparisons revealed a greater percentage of white participants in the BED group versus the BN and NBPO groups.