Table 1.
One-month prevalence of eating disorders in First-Australian (FA) and other-Australian (OA) adolescents
| First-Australian Adolescents | Other-Australian Adolescents | ||
|---|---|---|---|
| % (95% CI) | % (95% CI) | χ2 (1), p | |
| Any Eating Disorder (Major, OSFED, UFED) | 28.62 (23.83–33.94) | 21.68 (20.38–23.03) | 7.84, .005 |
| Major Eating Disorder | 7.53 (5.15–10.88) | 6.07 (5.38–6.85) | .13, .288 |
| Anorexia Nervosa (AN) | .89 (.30–2.59) | .66 (.45–.96) | 0.49, .401† |
| Probable Bulimia Nervosa (BN) | 5.11 (3.21–8.02) | 4.45 (3.86–5.13) | .31, .579 |
| Probable Binge Eating Disorder (BED) | 1.80 (.83–3.87) | .96 (.70–1.31) | 2.16, .142 |
| Other Specified Feeding and Eating Disorders (OSFED) | 15.22 (11.71–19.55) | 10.77 (9.83–11.78) | 5.97, .015 |
| Atypical Anorexia Nervosa (OSFED-AAN) | 3.92 (2.30–6.58) | 2.69 (2.23–3.23) | 1.71, .191 |
| Subthreshold Bulimia Nervosa (OSFED-SBN) | 1.50 (.64–3.47) | 2.21 (1.8–2.71) | .74, .390 |
| Subthreshold Binge Eating Disorder (OSFED-SBED) | .30 (.05–1.68) | .32 (.19–.55) | <.01, .952 |
| Purging Disorder (OSFED-PD) | 5.11 (3.21–8.02) | 3.12 (2.63–3.7) | 3.82, .051 |
| Night Eating Syndrome (OSFED-NES) | 7.14 (4.81–10.49) | 3.72 (3.17–4.36) | 9.12, .003 |
| Unspecified Feeding or Eating Disorder (UFED) | 5.32 (3.30–8.46) | 4.47 (3.85–5.19) | .46, .500 |
Note. Significant effects are highlighted in bold text. Based on weighted data. † based on Fishers Exact test due to low cell numbers. Total N for prevalence analyses varied for each diagnosis, dependent on the missingness of diagnostic data (AN: N = 4425; BN: N = 4401; BED/PD: N = 4399; AAN: N = 4388; sBN/sBED = 4398; NES: N = 4220; UFED: N = 3989; Major ED: N = 4401; OSFED: N = 4223; Any ED: N = 4036). The proportions of each diagnosis do not add up to the totals, except for the other-Australian category of Major eating disorders because where the DSM-5 allows it there is comorbidity (for instance between the OSFED diagnoses) – this is why the major eating disorder category proportion total is closer to the summation of the individual diagnoses within that category (the DSM-5 does not allow concurrent diagnosis between AN, BN and BED). The chi-square analyses are weighted, which slightly alters cell numbers