Validity and Reliability of Indonesian Languages Version of Zung Anxiety Self-Assessment Scale Questionnaire for Pulmonary Tuberculosis Patients

Abstract

Background: Patients with chronic disease, including tuberculosis, often get anxiety in their daily life.Valid and reliable instrument needed to detect anxiety in Tuberculosis patients in Indonesia. Therefore, ZungAnxiety Self-Assessment Scale questionnaire in the Indonesian language version should be validated andproved as a reliable instrument.Objective: The purpose of this research is to validate and to get the scientific evidence of reliability onIndonesian language version of Zung Anxiety Self-Assessment Scale questionnaire.Methods: The design of this study is cross sectional. Zung Anxiety Self-Assessment Scale questionnairesthat have been translated to Indonesian language are given and filled by 129 pulmonary tuberculosis patients.We used Corrected Item-Total Correlation table for validity test and Cronbach’s Alpha value for reliabilitytest.Results: Almost all of the questions (19 questions) are valid because Corrected Item-Total Correlationvalues for all the questions are more than r table (>0,174). One question, question number 17, is not valid andwas deleted because had negative r value. The questionnaire is also reliable with r Alpha value (Cronbach’sAlpha) 0,892.Conclusion: Indonesian language version of Zung Anxiety Self-Assessment Scale questionnaires is a validand reliable instrument to be used for detecting anxiety in adult pulmonary tuberculosis patients.