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Table 2 Univariate associations between demographic and clinical correlates and First Australian (FA) and eating disorder (ED) status, and their interaction

From: Prevalence, features and health impacts of eating disorders amongst First-Australian Yiramarang (adolescents) and in comparison with other Australian adolescents

 First AustralianOther Australian 
EDNo EDEDNo ED Main Effect
FA Status
Main Effect
ED Status
Interaction Effect
M (SD)dfF,ηp2, p
Age15.0 (1.3)14.4 (1.5)15.2 (1.4)14.7 (1.4)1, 40457.35, .007, .00225.40, .006, < .001.19, .66, < .001
Socioeconomic status975.0 (42.4)965.1 (42.1)987.4 (40.9)988.3 (42.3)1, 398440.11, < .001, .0102.53, .001, .1123.64, .057, .001
BMI percentile69.2 (27.6)55.7 (31.7)61.6 (29.7)50.7 (30.7)1, 40459.95, .002, .00236.69, .009, < .001.41, .521, < .001
Weight and Shape Concerns4.0 (1.8)0.9 (1.2)4.0 (1.6)1.0 (1.2)1, 4045.60, .440, < .0011235.15, .234, < .001.02, .893, < .001
Psychosocial quality of life impairment55.7 (27.2)79.8 (20.4)58.5 (25.2)82.3 (19.0)1, 39723.65, .056, .001295.51, .069, < .001.02, .896, < .001
Physical quality of life impairment72.6 (25.6)85.4 (22.9)77.6 (23.4)89.0 (15.5)1, 397212.63, < .001, .003101.16, .025, < .001.35, .555, < .001
 n (%) OR (95% CI)
FA adolescent
OR (95% CI)
Current ED
β (s.e.), p
Female Sex59 (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 eating27 (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
Fasting24 (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 vomiting15 (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 use6 (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 exercise8 (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
  1. 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