Table 2.
Univariate associations between demographic and clinical correlates and First Australian (FA) and eating disorder (ED) status, and their interaction
| First Australian | Other Australian | |||||||
|---|---|---|---|---|---|---|---|---|
| ED | No ED | ED | No ED | Main Effect FA Status |
Main Effect ED Status |
Interaction Effect | ||
| M (SD) | df | F,ηp2, p | ||||||
| Age | 15.0 (1.3) | 14.4 (1.5) | 15.2 (1.4) | 14.7 (1.4) | 1, 4045 | 7.35, .007, .002 | 25.40, .006, < .001 | .19, .66, < .001 |
| Socioeconomic status | 975.0 (42.4) | 965.1 (42.1) | 987.4 (40.9) | 988.3 (42.3) | 1, 3984 | 40.11, < .001, .010 | 2.53, .001, .112 | 3.64, .057, .001 |
| BMI percentile | 69.2 (27.6) | 55.7 (31.7) | 61.6 (29.7) | 50.7 (30.7) | 1, 4045 | 9.95, .002, .002 | 36.69, .009, < .001 | .41, .521, < .001 |
| Weight and Shape Concerns | 4.0 (1.8) | 0.9 (1.2) | 4.0 (1.6) | 1.0 (1.2) | 1, 4045 | .60, .440, < .001 | 1235.15, .234, < .001 | .02, .893, < .001 |
| Psychosocial quality of life impairment | 55.7 (27.2) | 79.8 (20.4) | 58.5 (25.2) | 82.3 (19.0) | 1, 3972 | 3.65, .056, .001 | 295.51, .069, < .001 | .02, .896, < .001 |
| Physical quality of life impairment | 72.6 (25.6) | 85.4 (22.9) | 77.6 (23.4) | 89.0 (15.5) | 1, 3972 | 12.63, < .001, .003 | 101.16, .025, < .001 | .35, .555, < .001 |
| n (%) |
OR (95% CI) FA adolescent |
OR (95% CI) Current ED |
β (s.e.), p | |||||
| Female Sex | 59 (67.8) | 84 (38.5) | 593 (73.3) | 1329 (45.5) | 1.32 (0.81, 2.81) | 3.30 (2.77, 3.93) | 0.01 (0.29), .965 | |
| Objective binge eating | 27 (31.0) | 11 (5.0) | 273 (33.7) | 147 (5.0) | 1.00 (0.54, 1.88) | 9.54 (7.67, 11.87) | −0.12 (0.40), .766 | |
| Fasting | 24 (27.6) | 13 (6.0) | 249 (30.9) | 129 (4.4) | 1.38 (0.77, 2.49) | 9.68 (7.70, 12.17) | −0.47 (0.39), .225 | |
| Self-induced vomiting | 15 (17.4) | 5 (2.3) | 90 (11.1) | 25 (0.9) | 2.88 (1.09, 7.61) | 15.00 (9.51, 23.67) | −0.49 (0.58), .394 | |
| Laxative use | 6 (7.0) | 4 (1.8) | 45 (5.6) | 22 (0.8) | 2.62 (0.89, 7.70) | 7.80 (4.62, 13.17) | −0.72 (0.71), .311 | |
| Driven exercise | 8 (9.2) | 7 (3.2) | 123 (15.2) | 95 (3.2) | 1.01 (0.46, 2.21) | 5.40 (4.08, 7.13) | −0.61 (0.55), .266 | |
Note. Socioeconomic status measured by SEIFA score; weight and shape concerns measured with the Eating Disorder Examination Questionnaire combined Weight and Shape Concern subscales score; quality of life impairment measured with the Pediatric Quality of Life Scale; objective binge eating, fasting, self-induced vomiting and laxative use defined as > 4 episodes in the past 28 days; driven exercise defined as > 20 episodes in the past 28 days. BMI body mass index