Translation, Cross-Cultural Adaptation, and Psychometric Evaluation of the Hospital for Special Surgery Pediatric Functional Activity Brief Scale (HSS Pedi-FABS) for Turkish Children and Adolescents

Background: Evaluating physical activity in children is crucial for determining functional limitations and promoting healthy growth. The Hospital for Special Surgery Pediatric Functional Activity Brief Scale (HSS Pedi-FABS) is a valid, concise tool that assesses activity levels of children and adolescents participating in sports. There is currently no validated Turkish version. Purpose: We sought to (1) translate and cross-culturally adapt the HSS Pedi-FABS into Turkish and (2) evaluate the scale’s psychometric properties in a Turkish pediatric and adolescent population. Methods: The HSS Pedi-FABS was translated and culturally adapted following established guidelines. Physically active, healthy, and Turkish-speaking children and adolescents aged 8 to 17 years were included in the study. The exclusion criteria were as follows: (1) orthopedic/neurological conditions limiting functional activity, (2) language difficulties that could limit comprehension, (3) cognitive impairments, (4) illiteracy, (5) major organ failure, (6) malignancy, and (7) refusal to participate. Psychometric evaluation included internal consistency (Cronbach’s α), test-retest ( t 1- t 2) reliability (intraclass correlation coefficient), construct validity (correlation with existing physical activity questionnaires), and floor/ceiling effects. Results: Fifty-five participants were included in the study. The Turkish version of the HSS Pedi-FABS (Turkish HSS Pedi-FABS) showed good internal and excellent test-retest reliability. Construct validity was demonstrated with strong correlations between the Turkish questionnaire and comparator instruments. No floor or ceiling effects were found as the minimum score was observed in