Psychometric evaluation of the muscle dysmorphic disorder inventory (MDDI) among gender-expansive people
Year: 2022
Type: article
Abstract: PURPOSE: Muscle dysmorphia is generally classified as a specific form of body dysmorphic disorder characterized by a pathological drive for muscularity and the preoccupation that one is too small or not sufficiently muscular. The majority of research on the condition has been conducted in cisgender men with a paucity of literature on gender minority people, a population that is at risk for muscle dysmorphia. One of the most widely used measures of muscle dysmorphia symptoms, the Muscle Dysmorphic Disorder Inventory (MDDI), has not been psychometrically validated for use in gender minority samples, the aim of the present study. METHODS: We evaluated the psychometric properties of the MDDI in a sample of 1031 gender-expansive individuals (gender minority people whose gender identity differs from that assumed for their sex assigned at birth and is not exclusively binary man or woman) aged 18-74 who were part of The PRIDE Study, a large-scale, U.S., longitudinal cohort study. RESULTS: Using a two-step, split-sample exploratory and confirmatory factor analytic approach, we found support for the original three-factor structure of the measure. The subscales showed adequate internal consistency, and convergent validity was supported based on significant associations of the MDDI subscale scores with theoretically related scores on a widely used measure of disordered eating. CONCLUSIONS: These findings provided novel support for adequate psychometric properties of the MDDI in a sample of gender-expansive individuals, facilitating the use of this measure in future research on muscle dysmorphia in this understudied and at-risk population.
Source: Journal of Eating Disorders
Language: English
Subfield: Clinical Psychology
Field: Psychology
Domain: Social Sciences
Open Access status: gold
Estimated APC paid: $1,790
Funders: U.S. Department of Defense, American Heart Association, Patient-Centered Outcomes Research Institute, National Institutes of Health, Uniformed Services University of the Health Sciences, National Heart, Lung, and Blood Institute, National Institute of Mental Health, National Institute on Drug Abuse, National Institute of Diabetes and Digestive and Kidney Diseases, Office of Extramural Research, National Institutes of Health
Awards: G1486477039, G3476937963, G5147292792, G676221786, G7243078255, G7877409749, G9000049773, G9000205005, G9000335344, UCSF-Kaiser Urological Epidemiology Research Career Development Program, Informing national guidelines on adolescent and young adult physical activity and sedentary behavior to prevent cardiovascular disease, G980255625
OpenAlex ID: W4284882401