LEP and eating disorder: There were no significant differences between groups for BMI, reported clinician and questionnaire-based diagnosis of eating disorder, serum leptin, adiponectin, fat mass, or vitamin D. However, multiple logistic regression models demonstrated an association of lower BMI at age 14, greater eating disorder score at age 17, lower BMI at age 20, and the presence of the questionnaire-based eating disorder diagnosis at age 20 with an increase in odds of having AIS.