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

Clark, C. J., Thomas, S., Carr, E. C.J. and Breen, A. C., 2012. Development and Validation of the Functional Difficulties Questionnaire for Assessing Developmental Coordination Disorder in Adults. Journal of Orthopaedic and Sports Physical Therapy, 10, A50 - A50.

Full text available as:

Validation_of_the_FDQ v3.pdf


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 (á = .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.

Item Type:Article
Group:Faculty of Health & Social Sciences
ID Code:20518
Deposited By: Symplectic RT2
Deposited On:19 Nov 2012 11:20
Last Modified:14 Mar 2022 13:45


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