Development and Validation of the Functional Difficulties Questionnaire for Assessing Developmental Coordination Disorder in Adults

This source preferred by Carol Clark

Authors: Clark, C., Thomas, S., Carr, E. and Breen, A.

Editors: Werstine and Chesworth

Journal: Journal of Orthopaedic and Sports Physical Therapy

Volume: 10

Issue: 42

Pages: A50

ISSN: 0190-6011

DOI: 10.2519/jospt.2012.0302

PURPOSE: The purpose of this study was to describe the development and preliminary psychometric evaluation of the Functional Difficulties Questionnaire (FDQ-9), an instrument designed to aid clinicians in the assessment of developmental coordination disorder (DCD) in adults.

RELEVANCE: There are currently no tools to assess DCD in adults with musculoskeletal pain. DCD is a neurodevelopmental disorder characterized by functional motor impairments described in childhood that, for some, persist into adulthood. Skill impairments in those with DCD include impaired perception and biomechanical dysfunction.

METHODS: The questionnaire was developed utilizing existing questionnaires, the Diagnostic and Statistical Manual for the Diagnosis of Mental Disorders (DSM-IV) criteria for the diagnosis of DCD, International Classification of Diseases (ICD-10), and International Classification of Functioning, Disability and Health (ICF). An initial 13-item pool was reviewed by an expert panel for face and content validity. This resulted in a 9-item questionnaire that was piloted on 3 groups (n = 257): (1) individuals with joint hypermobility syndrome, (2) convenience samples from a commercial company, and (3) staff and students of a university. Exploratory factor analysis was employed to assess the underlying factor structure. Aspects of validity and reliability were assessed.

RESULTS: Factor analysis using principal-axis factoring with oblimin rotation yielded 2 factors relating to fine and gross motor function. Overall internal reliability was high (รก = .81). Preliminary findings suggested satisfactory construct validity and test-retest reliability (ICC = 0.96; 95% CI: 0.92, 0.98).

CONCLUSIONS: Psychometric properties of this questionnaire appear promising, but further research is required to evaluate the validity of the questionnaire in new samples and audit its application in clinical practice.

IMPLICATIONS: This questionnaire has the potential to aid clinicians in their assessment of DCD and functional impairments in adults and therefore contribute to improved care planning.

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