Measuring the Knowledge, Attitude and Practice of Patients With Diabetes Mellitus-The Design and Development Process

Introduction Health behavior is important to control Diabetes Mellitus (DM) complications. Knowledge, attitude and practice (KAP) questionnaires are needed to assess healthy behavior. This research aimed to design and develop instruments to measure KAP of diabetic patients in the control of fasting blood glucose (FBG). Methods Evaluation of the validity and reliability was assessed by calculating the score of internal consistency, testing the validity of the items by Pearson product moment correlation test, and confirmatory factor analysis. The validity and reliability tests were done at primary care centers in Yogyakarta. This study was conducted from August to October 2019. There were three stages of validity testing and one stage of reliability testing. Results The results of the knowledge variable validity test showed 16 question items were valid, while the attitude variable had 23 valid question items and the practice variable had 26 valid question items. The Cronbach Alpha scores of the KAP questionnaire were 0.597; 0.777; 0.824, with all values > r for each table (0.344; 0.361; 0.355), respectively. The questionnaire is concluded as valid and reliable if it is able to measure variables well and can be used repeatedly in the same conditions and give the same results. Questionnaires concerning KAP in controlling FBG are needed to support changes in healthy behaviors of patients with DM. Conclusion The questionnaire to assess KAP proved to be valid and reliable. It is hoped that psychometric research concerning this questionnaire continues in various countries as a basis for improving these instruments.