Eating disorder predisposition toward eating disorders as a result of Mendelian inheritance. Twin studies have found a slight instances of genetic variance when considering the different criterion of both anorexia nervosa and bulimia nervosa as endophenotypes contributing to the disorders as a whole. A genetic link has been found on chromosome 1 in multiple family members of an individual with anorexia nervosa. An individual who is a first degree relative of someone who has had or currently has an eating disorder is seven to twelve times more likely to have an eating disorder themselves. Twin studies also show that at least a
Eating Disorder Inventory for use in a clinical setting to assess the presence of an eating disorder. Due to high comorbity associated with eating disorders it is generally used in conjunction with other psychological tests such as the Beck Depression Inventory. Depression has been shown to yield higher scores on the EDI-3. The Eating disorder inventory (EDI) comprises 64 questions, divided into eight subscales. Each question is on a 6-point scale (ranging from 'always' to 'never'), rated 0-3. The score for each sub-scale is then summed. The 8 subscale scores on the EDI are:<br> 1. Drive for thinness (DT): An excessive concern with