Translation and quality assessment of a questionnaire for practice toward Helicobacter pylori

Abstract

Helicobacter pylori infection is a preventable disease with correct practice. This study aimed to translate a questionnaire on practice toward Helicobacter pylori infection and to examine its content validity and reliability in the Thai version. The research design was a descriptive study, and it was conducted in two phases. Phase 1 involved the translation of the questionnaire using a forward-backward technique by professional translators from two independent university language institutes, followed by content validity assessment by five experts. Phase 2 focused on testing the reliability of the questionnaire in a sample of 30 individuals with dyspeptic symptoms who were at risk of the infection. Inclusion criteria were adults aged 20-59 years with a history of Helicobacter pylori testing. Participants were recruited from a tertiary hospital between July and August 2025. Data was analyzed using Cronbach’s alpha. The findings revealed that the Thai version of the questionnaire was conceptually equivalent to the original English version. Content validity was acceptable (Content Validity Index=0.91), and reliability was satisfactory, with a Cronbach’s alpha coefficient of 0.73. In conclusion, the translated questionnaire demonstrated good quality and can be applied to assess practice toward Helicobacter pylori infection in the Thai context.