Consensus-Based Development and Validation of Iranian ICF Core Set for 6–12-Year-Old Children with Cerebral Palsy: Iranian Occupational Therapists’ Perspectives

To develop and validate the Iranian ICF-CS for 6-12-year-old children with CP from the perspective of Iranian Occupational Therapists (OTs). In the first phase, using the Delphi technique, a three-round electronic-mail-survey was conducted from January to May 2022 among 22 experienced Iranian OTs working with children with CP. The experts were asked to identify and reach consensus on the most relevant ICF categories concerning the patients' problems, resources, and environmental aspects in children with CP. In the second phase, a new sample of 12 Iranian OTs rated the essentiality and relevancy of categories identified in the Delphi phase, with Content Validity Ratio (CVR), Item-Content Validity Index (I-CVI), Modified Kappa, and Scale-Content Validity Index/Average (S-CVI/Ave) calculated to ensure robust validation. Among 154 proposed categories of the Delphi process, 119 categories were confirmed in the validation phase including 6 Body-structures, 37 Body-functions, 52 Activity-and-participation, and 24 Environmental-factors with the CVR and I-CVI ranges of 0.67- 1.00 and 0.83-1.00 respectively. The S-CVI/Ave of 0.93 was obtained as the scale-level CVI. The Iranian ICF-CS for 6-12-year-old children with CP, consisting of 119 categories, demonstrated strong content validity from the perspective of Iranian OTs.