Maria Svedbo Engström1, Janeth Leksell2, Unn-Britt Johansson3, Katarina Eeg-Olofsson4, Sixten Borg5, Bo Palaszewski6, Soffia Gudbjörnsdottir7. 1. University of Gothenburg, Sahlgrenska Academy, Institute of Medicine, SE-413 46 Gothenburg, Sweden; Dalarna University, School of Education, Health and Social Studies, SE-791 88 Falun, Sweden. 2. Dalarna University, School of Education, Health and Social Studies, SE-791 88 Falun, Sweden; Uppsala University, Department of Medical Sciences, SE-751 85 Uppsala, Sweden. Electronic address: jle@du.se. 3. Sophiahemmet University, SE-114 86 Stockholm, Sweden; Karolinska Institutet, Department of Clinical Sciences and Education, Södersjukhuset, SE-118 83 Stockholm, Sweden. 4. University of Gothenburg, Sahlgrenska Academy, Institute of Medicine, SE-413 46 Gothenburg, Sweden; Sahlgrenska University Hospital, Gothenburg, Sweden. 5. Lund University, Department of Clinical Sciences in Malmö, Health Economics Unit, Medicon Village, SE-223 81 Lund, Sweden. 6. Region Västra Götaland, Department of Data Management and Analysis, Gothenburg, Sweden. 7. University of Gothenburg, Sahlgrenska Academy, Institute of Medicine, SE-413 46 Gothenburg, Sweden; Register Center Västra Götaland, SE-413 45 Gothenburg, Sweden.
Abstract
OBJECTIVE: To describe the development and evaluation of the content and face validity and test-retest reliability of a disease-specific questionnaire that measures patient-reported outcomes and experiences for the Swedish National Diabetes Register for adult patients who have type 1 or type 2 diabetes. METHODS: In this methodological study, a questionnaire was developed over four phases using an iterative process. Expert reviews and cognitive interviews were conducted to evaluate content and face validity, and a postal survey was administered to evaluate test-retest reliability. RESULTS: The expert reviews and cognitive interviews found the disease-specific questionnaire to be understandable, with relevant content and value for diabetes care. An item-level content validity index ranged from 0.6-1.0 and a scale content validity/average ranged from 0.7-1.0. The fourth version, with 33 items, two main parts and seven dimensions, was answered by 972 adults with type 1 and type 2 diabetes (response rate 61%). Weighted Kappa values ranged from 0.31-0.78 for type 1 diabetes and 0.27-0.74 for type 2 diabetes. CONCLUSIONS: This study describes the initial development of a disease-specific questionnaire in conjunction with the NDR. Content and face validity were confirmed and test-retest reliability was satisfactory. PRACTICE IMPLICATIONS: With the development of this questionnaire, the NDR becomes a clinical tool that contributes to further understanding the perspectives of adult individuals with diabetes.
OBJECTIVE: To describe the development and evaluation of the content and face validity and test-retest reliability of a disease-specific questionnaire that measures patient-reported outcomes and experiences for the Swedish National Diabetes Register for adult patients who have type 1 or type 2 diabetes. METHODS: In this methodological study, a questionnaire was developed over four phases using an iterative process. Expert reviews and cognitive interviews were conducted to evaluate content and face validity, and a postal survey was administered to evaluate test-retest reliability. RESULTS: The expert reviews and cognitive interviews found the disease-specific questionnaire to be understandable, with relevant content and value for diabetes care. An item-level content validity index ranged from 0.6-1.0 and a scale content validity/average ranged from 0.7-1.0. The fourth version, with 33 items, two main parts and seven dimensions, was answered by 972 adults with type 1 and type 2 diabetes (response rate 61%). Weighted Kappa values ranged from 0.31-0.78 for type 1 diabetes and 0.27-0.74 for type 2 diabetes. CONCLUSIONS: This study describes the initial development of a disease-specific questionnaire in conjunction with the NDR. Content and face validity were confirmed and test-retest reliability was satisfactory. PRACTICE IMPLICATIONS: With the development of this questionnaire, the NDR becomes a clinical tool that contributes to further understanding the perspectives of adult individuals with diabetes.
Authors: Maria Svedbo Engström; Janeth Leksell; Unn-Britt Johansson; Sixten Borg; Bo Palaszewski; Stefan Franzén; Soffia Gudbjörnsdottir; Katarina Eeg-Olofsson Journal: Health Qual Life Outcomes Date: 2019-08-14 Impact factor: 3.186