Table 1.
Clinical and demographic information by group
| Characteristic | AN (n = 22) | BN (n = 33) | HC (n = 30) | Analysis | |
|---|---|---|---|---|---|
| M (s.d.) | M (s.d.) | M (s.d.) | χ2(df), F(df), W, t(df) | p | |
| Age (years) | 24.6 (4.7) | 23.6 (3.9) | 23.9 (3.5) | χ2(2) = 0.8 | 0.69 |
| BMI (kg/m2) | 16.4 (1.4) | 22.0 (2.4) | 21.9 (2.1) | χ2(2) = 48.4 | <0.001 |
| NART IQ score (full) | 116 (5) | 114 (5) | 114 (5) | χ2(2) = 3.2 | 0.21 |
| RPM IQ score | 100 (11) | 99 (9) | 100 (9) | χ2(2) = 0.2 | 0.89 |
| BDI-II | 35.3 (12.0) | 32.7 (10.5) | 2.4 (2.8) | χ2(2) = 57.7 | <0.001 |
| TAI | 63.1 (10.4) | 62.8 (7.3) | 33.0 (6.9) | F(2) = 151.1 | <0.001 |
| EDE-Q | 4.4 (0.8) | 4.6 (0.8) | 0.2 (0.2) | χ2(2) = 58.0 | <0.001 |
| EDE ratings | |||||
| OBEs | 38.1 (47.9) | 23.0 (29.1) | – | W = 325.0 | 0.51 |
| SBEs | 9.5 (12.8) | 6.6 (6.2) | – | W = 341.5 | 0.93 |
| Vomiting episodes | 43.5 (51.6) | 24.2 (31.0) | – | W = 304.0 | 0.31 |
| Laxative episodes | 1.1 (3.4) | 2.0 (3.9) | – | W = 421.5 | 0.18 |
| Exercise episodes | 7.4 (13.6) | 10.9 (9.4) | – | W = 478.5 | 0.04 |
| Age of onset (years) | 15.6 (2.4) | 16.2 (3.1) | – | t(51.8) = −0.8 | 0.42 |
| Illness duration (years) | 9.0 (5.8) | 7.4 (4.0) | – | t(34.4) = 1.1 | 0.27 |
| Comorbid anxiety (%) | 13.6 | 9.1 | – | χ2(1) = 0.3 | 0.69 |
| Comorbid MDE (%) | 68.2 | 48.5 | – | χ2(1) = 2.1 | 0.15 |
| Comorbid personality (%) | 9.1 | 15.2 | – | χ2(1) = 0.4 | 0.69 |
| Any current treatment (%) | 59.0 | 45.5 | – | χ2(1) = 1.0 | 0.32 |
| Psychotherapy (%) | 40.9 | 27.3 | – | χ2(1) = 1.1 | 0.29 |
| Medication (%) | 45.5 | 30.3 | – | χ2(1) = 1.3 | 0.25 |
| Prior AN-R (%) | 63.6 | 30.3 | – | χ2(1) = 6.0 | 0.01 |
BMI, body mass index; NART, National Adult Reading Test; RPM, Online Raven's Progressive Matrices; BDI-II, Beck Depression Inventory-II; TAI, Trait Anxiety Inventory; EDE-Q, Eating Disorder Examination Questionnaire; EDE, Eating Disorder Examination; OBE, objective binge-eating episode; SBE, subjective binge-eating episode; MDE, major depressive episode; AN-R, anorexia nervosa restrictive subtype.
EDE ratings reflect counts over the previous 28 days. Group differences were evaluated using one-way ANOVA and, for non-normally distributed data, the nonparametric Kruskal–Wallis test. The two-samples t test (two-sided), Mann–Whitney U test and chi-square test were used to assess differences between AN and BN groups.