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Table 1 Overview of questionnaire measures used in the sample. For more detailed information of each of the instruments please refer to the Supplementary Material (1.3.1–1.3.20, Additional file 1

From: Study protocol of comprehensive risk evaluation for anorexia nervosa in twins (CREAT): a study of discordant monozygotic twins with anorexia nervosa

Questionnaire

Measure

MiniMeal-Questionnaire

General diet behaviors

Impulsive Behavior Scale (SUPPS-P)

Impulsivity

Active-Questionnaire (Active-Q)

Physical activity

Eating Disorder Examination - Questionnaire (EDE-Q)

Disordered eating behavior

Quality of Life Inventory (QOLI)

Quality of life

Nicotine Dependency Scale

Nicotine dependence

Hormonal, Menstrual and Reproductive History (HMRH)

Reproductive history

Perception of Teasing Scale (POTS)

Weight and competency teasing

Edinburgh Handedness Inventory

Handedness

Behavioral Inhibition/Approach System (BIS/BAS)

Behavioral inhibition and approach tendencies

Multidimensional Perfectionism Scale (MPS)

Perfectionism

Patient Health Questionnaire (PHQ9)

Depression

Generalized Anxiety Disorder (GAD-7)

Severity of anxiety disorder

Autism Spectrum Quotient (AQ-10)

Position on the autism-normality continuum

Obsessive Compulsive Inventory – Revised (OCI-R)

Compulsive behaviour

Big Five Inventory (BFI)

Extraversion, agreeableness, consciousness, neuroticism, openness

Online 24-Hour Recall Log Book

Nutrition intake

Visual Analogue Scale (VAS)

Hunger and thirst

Positive and Negative Affect Schedule (PANAS)

Positive and negative affect

Stool and Medication Questionnaire

Gastrointestinal symptoms and medication intake