Symptoms in patients on long-term proton pump inhibitors : prevalence and predictors.

Background Symptom control in primary care patients on long-term proton pump inhibitor (PPI) treatment is poorly understood. Aim To explore associations between symptom control and demographics, lifestyle, PPI use, diagnosis and Helicobacter pylori status. Methods A cross-sectional survey (n = 726) using note reviews, questionnaires and carbon-13 urea breath testing. Determinants of symptom control [Leeds Dyspepsia Questionnaire (LDQ), Carlsson and Dent Reflux Questionnaire (CDRQ), health-related quality-of-life measures (EuroQoL: EQ-5D and EQ-VAS)] were explored using stepwise linear regression. Results Moderate or severe dyspepsia symptoms occurred in 61% of subjects (LDQ) and reflux symptoms in 59% (CDRQ). Age, gender, smoking and body mass index had little or no influence upon symptom control or PPI use. Average symptom scores and PPI use were lower in patients with non-ulcer dyspepsia and gastro-protection than gastro-oesophageal reflux disease (GERD) and uninvestigated dyspepsia. H. pylori infection was associated with lower reflux symptom scores only in patients with GERD and uninvestigated dyspepsia. EQ-5D was not able to discriminate between diagnostic groups, although the EQ-VAS performed well. Conclusions A majority of patients suffered ongoing moderate or severe symptoms. GERD and uninvestigated dyspepsia were associated with poorer long-term symptom control; H. pylori appeared to have a protective effect on reflux symptoms in these patients.