DOS 2020

176 · DOS Abstracts The prevalence of ankle contractures and the association with age, gross motor function and spasticity among children and adolescents in Denmark Lærke Hartvig Krarup, Sofie Langbo Bredtoft, Louise Strand, Inger Mechlenburg, Kirsten Nordbye-Nielsen Department of Orthopaedic Surgery, Aarhus University Hospital, Denmark; Department of Orthopaedic Surgery, Department of Childrens Ortopaedic, Aarhus University Hospital, Denmark, Aarhus University Hospital, Denmark; Department of Orthopaedic Surgery, CPNorth: Living life with cerebral palsy in the Nordic countries, Aarhus University Hospital, Denmark Background: Despite preventive treatment, children with Cerebral Palsy (CP) of- ten develop muscle contractures, which limits their joint motion. This is problematic since reduced joint motion composes a limiting factor for the child’s functional ca- pacity and motor skills, which may result in limitations at activity and participation. Furthermore, there is a strong association between gross motor function and quality of life. A greater understanding of factors which contributes to the development of ankle contractures may be useful in the development of future treatment strategies for children with CP. Purpose / Aim of Study: The aim of this study was to investigate the preva- lence of ankle contractures among children and adolescents with CP in Denmark. Furthermore, to investigate how the prevalence varied in accordance with age, gross motor function, and spasticity. Materials and Methods: The study is a cross sectional study based on extracted data from the nationwide clinical quality database (CPOP). The study population was children aged 6- 14 years, who in the period from 2018-2019 had been sys- tematically examined by a physiotherapist and registered in the CPOP database. Information on Gross Motor Function Classification System Expanded and Revised level (GMFCS-E&R) and passive range of motion in the ankle joint with an extend- ed knee was measured for 663 children. For 598 children information on Modified Ashworth Scale score (MAS) was registered. The associations between the preva- lence of ankle contractures and age, GMFCS-E&R level and MAS-score were esti- mated as odds ratio (OR) and 95% confidence intervals (95% CI) with the use of logistic regression. Findings / Results: 31% of the study population had an ankle contracture. ORs for ankle contracture were significant higher for children with GMFCS- E&R level IV-V (OR: 1.82, 95% CI: 1.26; 2.62) relative to level I-III and MAS-score 2- 4 (OR: 2.37, 95% CI: 1.47; 3.82) relative to MAS-score 0. There was no association with the degree of spasticity. Ankle contracture was not significantly associated with age. Conclusions: Ankle contractures are frequent in children with CP. The study indi- cated that ankle contracture was associated with level of gross motor function. 155.