Assessing the Content and Face Validity of Persian Version of Fatigue Scale in Children with Cancer, From the Perspective of Parents and Hospital Staffs

Introduction: Fatigue is one of the most debilitating conditions associated with cancer and anticancer therapy. The purpose of this study was to translate the fatigue questionnaire in Persian for developing an appropriate instrument to evaluate the effect of rehabilitation and other interventions on fatigue in intended patients. Materials and Methods : The present study was analytical and descriptive. Thirty experts and 15 children with cancer who were treated at Mahak Hospital and their parents were asked to participate in the study through convenience sampling. For content validity, CVI (content validity index) has been calculated as an aggregation of concessions for each item that has earned Relevant but Needed to Review and Completely Related points divided by the total number of specialists. To determine the CVR (content validity ratio), experts were asked to check each item based on the three-part spectrum. To assess the face validity of the scales, forms for rating and explaining the scoring for questionnaires of all three scales were given to 15 participants, and they were asked to answer each question scale based on the three concepts of relevance, clarity and simplicity on the 4-point graph. Scores higher than 0.79 indicated the suitability of the items for further analysis. Results: The translated questionnaire was completed by the participants. In the content validity section, according to the critical point of the Lawshe table, CVR was acceptable at 0.49. The translation of items by CVI less than 0.79 was modified. Finally, CVIs of all items were averaged, and the final score was determined as the CVI level. In the face validity section, scores higher than 0.79 indicated the suitability of items for further analysis. Conclusion: The Persian version of fatigue scale can be considered as one of the suitable instruments in measuring the influence of fatigue on activities of daily living. Keywords: Cancer; Child; Fatigue; Parent; Reliability; Staff; Validity