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Known-groups validity of the RESQ-eD in the PRO Validation Study, using the GSRS domains and single item “burping” as reference (all enrolled eligible patients, N=580). GSRS score (0–6) groups: low, if score ≤4.0; medium, if score >4.0 to ≤5.0; high, if score >5.0. GSRS, Gastrointestinal Symptom Rating Scale; PRO, patient-reported outcome; RESQ-eD, Reflux Disease Questionnaire electronic Diary.
