CROSS-CULTURAL VALIDATION AND ADAPTATION OF THE FLEMISH VERSION OF THE PARTICIPATION AND ENVIRONMENT MEASURE OF CHILDREN AND YOUTH (PEM-CY). Marieke Coussens, Ms C OT, PhD candidate12 Niki Bulckmans, MsC OT3 Dominique VandeVelde12, MsC OT, PhD, Prof. 1Faculty of Medicine, Department of Physical therapy and motor rehabilitation, Ghent University, Belgium. 2 Department of Occupational Therapy, Artevelde University College Ghent, Belgium. 3 Department of Occupational Therapy, Artesis Plantijn University College, Belgium. marieke.coussens@ugent.be niki.bulckmans@ap.be dominique.vandevelde@ugent.be Introduction: Participation refers to a child’s involvement in important everyday activities. The PEM-CY examines participation frequency, extent of involvement and desire for change in sets of activities typical for the home, school or community. It also includes an assessment of the effect of environment on children’s participation. Objectives: The aim of this study was 1) to translate, culturally adapt and investigate the psychometric properties of the Flemish version of the PEM-CY and 2) to draw a profile of the level of participation among children with Attention Deficit Hyperactive Disorder (ADHD), Autism Spectrum Disorder (ASD) and Developmental Coordination Disorder (DCD) in Belgium (Flanders). Methods: Convenience sampling method was used to survey caregivers of children. Parents completed an online demographic questionnaire and web-based Flemish PEM-CY version. Results: Participants were 149 caregivers of children between 5 to 13 years of age (mean= 8 y, 42.1 % girls). 89,5% respondents were mothers. 53.9 % of the children received a diagnosis. Functional skills such as attention (63,4%), communication (53,7%), managing emotions (48,8%), controlling behaviors (41,5%) and reacting to sensations (36,6%) are more strongly linked to participation outcomes according to caregivers perceptions. Internal consistency is good to strong for the participation scales and environment scale (α ranges 0,529 - 0,860). For the domain school (frequency) internal consistency is weak (α = 0,278). Test-retest reliability is moderate at scale level (ICC 0,37-0,70), but at item level it is highly variable. Construct validity of the PEM-CY is supported as it can detect significant differences between children with and without a diagnose, but not for all the variables. It can also determine differences regarding household income and gender. Significant negative correlations (domain home r = -0,477, domain school r = - 0,538 and domain community r = -0,452) between desire for change and supportiveness of the environment support the Conclusion: Although initially designed for research use, information from the PEM-CY may be useful in clinical practice to identity baseline concerns and to set intervention priorities for clients.