Table 2.
Differences between the four clusters based on EDI-Drive for Thinness (DT) and CBCL-Anxious/Depressed (A/D) scores in self-reported history of anorexia nervosa (AN) or bulimia nervosa (BN) among unrelated females who participated in both Waves 3 and 4 (n=412)
| Mean (SD) for quantitative criteria and percentage for binary |
Comparison between clusters |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 412 unrelated girls aged 16–17 | Mild (1) 77% (n=320) |
DT (2) 10.4% (n=43) |
A/D (3) 9.9% (n=41) |
DT-A/D (4) 1.9% (n=8) |
p-value/ 1Test Value |
2Contrasts (p<.05) |
||||
| EDI – Drive for Thinness | 1.19 | (1.52) | 11.16 | (3.59) | 1.54 | (1.96) | 15.75 | (3.5) | <.001/466.5 | 1=3<2<4 |
| CBCL – Anxious-Depressive | 0.94 | (1.24) | 1.35 | (1.53) | 9.32 | (3.64) | 10.63 | (4.34) | <.001/343.4 | 1=2<3=4 |
| Wave 3 (16–17 years old) cross-sectional eating disorders | ||||||||||
| History of AN (2.4%; n=10/412) | 1.3% (n=4) |
4.7% (n=2) |
4.9% (n=2) |
25% (n=2) |
<.001/22.4 | 1<2,3,4 | ||||
| History of BN (1.2%; n=5/412) | 0.6% (n=2) |
4.7% (n=2) |
0.0% (n=0) |
12.5% (n=1) |
<.01/14.17 | 1<2,4 | ||||
| Wave 4 (19–20 years old) prospective eating disorders | ||||||||||
| History of AN (4.4%; n=18/412) | 3.8% (n=12) |
2.3% (n=1) |
2.4% (n=1) |
50.0% (n=4) |
<.001/40.9 | 1,2,3<4 | ||||
| History of BN (2.4%; n=10/412) | 0.9% (n=3) |
9.3% (n=4) |
2.4% (n=1) |
25.0% (n=2) |
<.001/28.8 | 1<2,4 | ||||
Abbreviations: EDI: Eating Disorders Inventory; CBCL: Child Behavior Checklist
1
Test values: Kruskal Wallis and Pearson chi-squared tests (3 degrees of freedom)
2
Contrasts: Mann Whitney U