Cross-cultural Adaptation, Validation and Reliability of Turkish Version of Child Engagement in Daily Life Measure V2 for Children With Cerebral Palsy.

Purpose: The aim of this study is to cross-culturally adapt the the Child Engagement in Daily Life Measure V2 (CEDL) to Turkish language and culture and to examine the structural validity and reliability of the Child Engagement in Daily Life Measure V2 (CEDL) in Turkish children with cerebral palsy. Methods: Translation and cross-cultural adaptation: In the present study, permission for the translation and validation process of the CEDL V2 was obtained from the CEDL team at Drexel University. Based on previous studies and guidelines forward and backward translation methods were used to perform the crosscultural adaptation. In Stage 1, two independent professionals translated the CEDL V2 from English to Turkish. After the translated versions were harmonized as a first version (Stage 2) with discussion and consensus of translators and second author, a different bilingual translator with English as her native language performed a backtranslation (Stage 3), who was unfamiliar with and blinded to the original version of the CEDL V2 and the back-translation was reviewed by the developers of the CEDL V2 (Stage 4). In Stage 5, an expert committee, including first and second author, reviewed the prefinal Turkish version of the CEDL V2. Lastly, the prefinal version of the questionnaire was piloted in parents of children with disabilities (n = 30) and without disabilities (n = 30) to determine the clarity of all items and their compatibility for Turkish parents (Stage 6). The Turkish version of the CEDL V2 was finalized as the parents recruited for the pilot study indicated that clarity and understandability of the items were acceptable. Research design: A cross-sectional and a single-centre study with a test-retest method and comparison group (children without disability) was conducted to determine the reliability and validity of the Turkish version of the CEDL V2. Participants: The study protocol was approved by the Medical Faculty of Yıldırım Beyazıd University Ethics Committee (26379996/28). Based on the principles stated in the Declaration of Helsinki, all subjects were informed about the study and the inform consent was taken from the families. Parents of children with CP 1.5-11 years of age who applied to the Physical Medicine and Rehabilitation Clinic of Ankara City Hospital will be included in the study. Parents of children with and without CP will be asked to complete the Turkish version of the CEDL V2 if they met the including criteria. Before completing the questionnaires, the sociodemographic characteristics of the parents of children with CP and without CP such as name, surname, age, gender, parent relationship to the child, parent's age, parent's education level, parent's work status, family income (monthly) will be recorded in medical records. Therapists will determine the child's GMFCS ve MACS level through observation and interview with the parent. The participants will be asked to participate in the test-retest component of the study and if they want they will complete the instrument after 2 weeks again. The parents of the children without CP will be asked to complete the measure independently of the primary study participants. Statistical Analysis The internal consistency of the CEDL scale will be determined by calculating Cronbach's alpha. Rasch analysis will be done by calculating the validity of the questionnaire (construct validity-known groups method) as in the original article. A sample size of 250 patients for Rasch analysis would be able to estimate item difficulty within the range of α=0.05 to ±0.32 logit. This sample size is also sufficient to test for item function difference. A difference of 0.32 between residuals with α=0.05 and β=0.20 Type I and II error values can be detected for any 2 groups . Latest status: The study was started on 01.10.2021 at Ankara Bilkent City Hospital , department of Physical Therapy and Rehabilitation in Turkey after approval for the present study had been obtained by the local ethics committee of the Yıldırım Beyazıt University and after the translation and cross-cultural adaptation of the measure had been completed . The measure was filled by parents of 273 children with cerebral palsy and 100 children without cerebral palsy.