Table 1.
Full sample characteristics and comparisons between dietary restraint and dietary restraint/negative affect subtypes on demographic and psychosocial variables (M±SD, unless otherwise indicated)
| Variable | Full sample (n=172)a | DR/NA (n=45) | DR (n=114) | Statistic |
|---|---|---|---|---|
| Demographic Variables | ||||
|
| ||||
| Female, % (n) | 62.8 (108) | 55.6 (25) | 63.2 (72) | χ2=0.8 |
| Age, y | 12.8±2.9 | 13.9±2.5 | 12.5±2.9 | t=3.0** |
| z-BMI | 2.0±0.7 | 2.1±0.6 | 1.9±0.8 | t=1.3 |
| White | 60.5 (104) | 60.0 (27) | 56.1 (64) | |
| Black | 28.5 (49) | 33.3 (15) | 29.8 (34) | |
| Race, % (n) Hispanic | 8.1 (14) | 6.7 (3) | 9.6 (11) | χ2=2.5 |
| Asian | 1.2 (2) | 0.0 (0) | 1.8 (2) | |
| Other | 1.7 (3) | 0.0 (0) | 2.6 (3) | |
| Treatment seeking, % (n) | 50.6 (87) | 66.7 (30) | 37.7 (43) | χ2=10.9** |
|
| ||||
| Eating Related Psychopathology | ||||
|
| ||||
| EDE Restraint | 1.1±0.9 | 1.4±1.0 | 1.0±0.9 | t=2.3* |
| EDE Eating Concern | 0.8±0.8 | 1.1±1.0 | 0.7±0.7 | F=3.6 |
| EDE Shape Concern | 2.2±1.4 | 2.8±1.4 | 2.0±1.4 | F=6.6* |
| EDE Weight Concern | 2.3±1.2 | 2.8±1.1 | 2.1±1.2 | F=5.7* |
| EDE Global | 1.6±0.9 | 2.0±0.9 | 1.4±0.8 | F=8.5** |
| SBE frequencyb | 1.2±2.8 | 1.1±2.6 | 1.4±3.0 | F=0.0 |
| OBE frequencyb | 2.3±4.9 | 4.2±7.6 | 1.6±3.5 | F=4.0* |
| Compensatory behaviors, % (n) reportingc | 6.4 (11) | 4.4 (2) | 7.0 (8) | χ2=0.5 |
|
| ||||
| General Psychopathology | ||||
|
| ||||
| CDI Total | 10.4±7.2 | 19.8±5.0 | 6.7±3.7 | t=15.9*** |
| CBCL Internalizing | 55.7±13.3 | 62.8±11.3 | 51.9±12.4 | F=19.9*** |
| CBCL Externalizing | 52.1±13.0 | 58.8±12.0 | 49.0±12.4 | F=14.4*** |
| CBCL Total | 55.6±12.9 | 63.1±11.2 | 51.8±11.8 | F=21.9*** |
p<.05;
p<.01;
p<.001
Note: DR/NA=dietary restraint/negative affect subtype; DR=dietary restraint subtype; z-BMI=body mass index z-score accounting for age and sex (Ogden, Flegal, Carrol, & Johnson, 2002); EDE=Eating Disorder Examination; OBE=objective bulimic episode; SBE=subjective bulimic episode; CDI=Children’s Depression Inventory; CBCL=Child Behavior Checklist.
13 participants from the full sample were excluded from the cluster analysis because of missing data.
Reported eating episode frequencies are for the month prior to assessment only.
Compensatory behaviors include self-induced vomiting, laxative use, diuretic use, and driven exercise. The rates reported pertain to the number of participants endorsing use of any of these behaviors in the month prior to assessment.