Eating disorders in adolescent females with and without type 1 diabetes: cross sectional study

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Abstract
Objective: determine the prevalence of eating disorders in adolescent females with type 1 diabetes mellitus compared with that in their non-diabetic peers. Design: Cross sectional case-control led study. Setting: Diabetes clinics and schools in three Canadian cities. Subjects: 356 females aged 12-19 with type 1 diabetes and 1098 age matched non-diabetic controls. Main outcome measure: Eating disorders meeting Diagnostic and Statistical Manual of Mental Disorders(DSM-IV) criteria. Results: Eating disorders that met DSM-IV criteria were more prevalent in diabetic subjects (36, 10%) than in non-diabetic controls (49, 4%) (odds ratio 2.4, 95% confidence interval 1.5 to 3.7; P1cconcentration was higher in diabetic subjects with an eating disorder (9.4% (1.8)) than in those without (8.6% (1.6)), P=0.04). Conclusions: DSM-IV and subthreshold eating disorders are almost twice as common in adolescent females with type 1 diabetes as in their non-diabetic peers. In diabetic subjects, eating disorders are associated with insulin omission for weight loss and impaired metabolic control.