Table 1.
Demographic and clinical information.
| HC (n = 28) | AN (n = 28) | BN (n = 27) | BED (n = 11) | Statistical evaluation of group differencesa | |
|---|---|---|---|---|---|
| Demographic information (mean [SD]) | |||||
| Age (years) | 24.64 (5.14) | 30.00 (10.51) | 25.30 (6.85) | 28.73 (11.33) | χ2(3) = 4.590, p = 0.204 |
| BMI (kg/m2) | 22.04 (2.03) | 16.55 (1.79) | 22.57 (3.30) | 28.86 (6.92) | F(3, 90) = 37.081, p < 0.001 |
| Right handed (%) | 82.14% | 78.57% | 96.30% | 81.81% | |
| % completed undergraduate degree | 100.00% | 77.78% | 79.17% | 88.89% | |
| ED-related variables (mean [SD]) | |||||
| EDE-Q Global | 0.53 (0.66) | 3.80 (1.29) | 4.29 (1.00) | 3.65 (1.08) | χ2(3) = 57.166, p < 0.001 |
| Self-reported length of illness (years) | – | 10.59 (10.04) | 5 (5.51) | 2.32 (3.99) | χ2(2) = 14.163, p = 0.001 |
| Lowest weight at current height (kg) | – | 35.81 (9.31) | 49.78 (7.08) | 62.55 (15.83) | |
| Binge eating episodes (n reported in preceding 28 days [mean frequency [SD])b | 0 | 8 | 27 | 11 | χ2(2) = 2.466, p = 0.291 |
| (0.00 [0.000]) | (11.14 [22.34]) | (18.04 [22.78]) | (8.00 [5.15]) | ||
| Purge frequencyc (n reported in preceding 28 days [mean frequency [SD]) | 0 | 12 | 25 | 0 | t(11.494) = 1.724, p = 0.111 |
| (0.00 [0.000]) | (35.93 [83.97]) | (24.65 [24.60]) | (0.00 [0.000]) | ||
| Self-induced vomiting episodes (n reported in preceding 28 days [mean frequency [SD]) | 0 | 9 | 19 | 0 | |
| (0.00 [0.000]) | (28.19 [82.78]) | (16.94 [20.48]) | (0.00 [0.00]) | ||
| Laxative use (n reported in preceding 28 days [mean frequency [SD]) | 0 | 5 | 12 | 0 | |
| (0.00 [0.000]) | (9.07 [28.20]) | (6.00 [9.90]) | (0.00 [0.00]) | ||
| Diuretic use (n reported in preceding 28 days [mean frequency [SD]) | 0 | 0 | 4 | 0 | |
| (0.00 [0.000]) | (0.00 [0.00]) | (1.70 [5.60]) | (0.00 [0.00]) | ||
| n reporting comorbid diagnoses (%) | 0 (0%) | 15 (53.2%) | 9 (33.3%) | 2 (18.2%) | |
| n currently taking medicationd (%, n taking antidepressants) | 0 (0%) | 19 (67.9%, 11) | 8 (29.6%, 5) | 5 (45.5%, 1) | |
| Hunger (mean [SD]) | |||||
| VAS scale | 0.31 (0.25) | 0.20 (0.23) | 0.28 (0.28) | 0.40 (0.31) | χ2(3) = 6.065, p = 0.109 |
Re-printed and adapted with permission from Bartholdy et al. (2017), Temporal discounting in eating disorders, Eur. Eat. Disord. Rev., 2017, https://dx.doi.org/10.1002/erv.2513.
a
Group differences were evaluated using Kruskal-Wallis chi-square tests, one-way ANOVAs and t-tests as appropriate.
b
Comparison between those who reported binge eating in the AN, BN and BED groups.
c
Comparison between those who reported any purging behaviour (including self-induced vomiting, laxative use or diuretic use) in the AN and BN groups.
d
Not including oral or internal contraceptive medication.