Validity of self-reported Helicobacter pylori eradication treatment from questionnaire and interview surveys of the JPHC-NEXT study: comparison with prescription history from insurance claims data.
Tomomi KiharaKazumasa YamagishiTakuya ImatohHikaru IhiraAtsushi GotoHiroyasu IsoNorie SawadaShoichiro TsuganeMamami InouePublished in: Journal of epidemiology (2024)
Both the questionnaire and the interview showed high sensitivity, high specificity, and good agreement with the insurance claim prescriptions data. Some participants may have received eradication treatment without going through the public insurance claim database, resulting in a low positive predictive value.