Physical & Occupational Therapy in Pediatrics, Early Online:1–15, 2014 C  2014 by Informa Healthcare USA, Inc. Available online at http://informahealthcare.com/potp DOI: 10.3109/01942638.2014.975311 ARTICLE Inter-Rater and Test–Retest Reliability of the German Pediatric Evaluation of Disability Inventory (PEDI-G) Christina Schulze 1,2 , Anders Kottorp 1,2 , Andr´ e Meichtry 1 , Margareta Lilja 3 , & Julie Page 1 1 ZHAW, Health, Winterhur, Switzerland, 2 Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden, 3 Department of Health Sciences, Lule˚ a University of Technology, Lule˚ a , Sweden ABSTRACT. Activities of daily living (ADL) of children are widely assessed with the Pediatric Evaluation Disability Inventory (PEDI). This study examined test–retest and inter-rater reliability of the German PEDI (PEDI-G). During the adaptation of the PEDI nine items were added. In total, 117 parents of 53 children without and 64 chil- dren with a diagnosed physical disability from Austria, Germany, and Switzerland par- ticipated. Reliability was examined by intraclass correlation coefficient (ICC), standard error of measurement (SEM) and smallest detectable difference (SDD) for the Func- tional Skill Scale with and without added items and the Caregiver Assistance Scale. Co- hen‘s Kappa was used to calculate the reliability of the Modification Scale. All ICC’s for test–retest and inter-rater reliability were above 0.75, indicating good to very good reliability. The SDD varied from 0.83–5.58 across PEDI domains and scales. For the Modification Scale, Cohen’s weighted kappa varied from 0.25 to 1.00 indicating suffi- cient reliability for some but not all items. Our findings indicate that the Functional Skill Scale and the Caregiver Assistance Scale of the PEDI-G are reliable scales that can be used to evaluate ADLs of children with and without physical disability. KEYWORDS. Activities of daily living, children, german translation and adaptation, pediatric evaluation disability inventory, physical disability, reliability Activities of daily living (ADL) assessments are of fundamental importance in oc- cupational therapy (Gantschnig et al., 2013; Kottorp et al., 2003; Morales et al., 2008). Currently, there is a lack of pediatric ADL assessments that have been de- veloped and/or validated to be used in German-speaking countries (Projektgruppe ergotherapeutische Befundinstrumente in der P ¨ adiatrie, 2004). This gap means that professionals in the health care section in these countries have virtually no reliable Address correspondence to: Christina Schulze, School of Health Professions, Institute of Occupational Ther- apy, Zurich University of Applied Sciences, Technikumstrasse 71, CH-8401 Winterthur, Switzerland (E-mail: Christina.Schulze@zhaw.ch). (Received 14 January 2014; accepted 31 August 2014) 1 Phys Occup Ther Pediatr Downloaded from informahealthcare.com by 212.101.18.19 on 12/12/14 For personal use only.