Prevalence of Eating Disorder Symptomatology Among Outpatients Referred to Health Promotion from Somatic Hospital Departments

The Eating Disorder Examination Questionnaire (EDE-Q) is a 28-item self-reported questionnaire adapted from the semi-structured interview Eating Disorder Examination (EDE) and designed to assess the range and severity of features associated with a diagnosis of eating disorder using 4 subscales (Restraint, Eating Concern, Shape Concern and Weight Concern) and a global score.

The EDE-Q generates two types of data: frequency data on key behavioural features of eating disorders in terms of number of episodes of the behaviour, and subscale scores reflecting the severity of characteristics of eating disorders.

Higher scores on the global scale and subscales denote more problematic eating behaviours and attitudes.

The Binge Eating Disorder Questionnaire (BED-Q) is a 9-item self-reported questionnaire. Items are rated on a 5-point Likert-type rating scale. Scores range between 0-32 and higher scores denote more problematic binge eating disorder. A diagnostic score that determine patient is diagnosed with Binge Eating Disorder or not can be calculated. 1 item rated "yes" or "no and other items are used to calculated a diagnostic score.

Grazing Questionnaire (GQ) is a 8-item self-reported questionnaire to measure behaviours and cognitions specific to grazing. Items are rated on a 5-point Likert-type rating scale where higher scores represent more grazing behaviours and cognitions. Scores are summes to form a total score (range: 0-32).

Self-reported quality of life questionnaire. The EQ-5D-5L essentially consists of 2 pages: the EQ-5D descriptive system and the EQ visual analogue scale (EQ VAS).

The descriptive system comprises five dimensions: mobility, self-care, usual activities, pain/discomfort and anxiety/depression. Each dimension has 5 levels: no problems, slight problems, moderate problems, severe problems and extreme problems. The patient is asked to indicate his/her health state. This decision results in a 1-digit number that expresses the level selected for that dimension. The digits for the five dimensions can be combined into a 5-digit number that describes the patient's health state.

The EQ VAS records the patient's self-rated health on a vertical visual analogue scale, where the endpoints are labelled 'The best health you can imagine' and 'The worst health you can imagine'. The VAS can be used as a quantitative measure of health outcome that reflect the patient's own judgement.