Abstract:
BACKGROUND:The reflux disease questionnaire (RDQ) is a short, patient-completed instrument. AIMS:To investigate the psychometric characteristics of the RDQ in patients with heartburn-predominant (HB) and non-heartburn predominant (NHB) dyspepsia. METHODS:HB (n = 388) and NHB (n = 733) patients were randomized to esomeprazole 40 mg daily or twice daily for 1 week, followed by 3 weeks of esomeprazole 40 mg daily. RESULTS:High factor loadings (0.78-0.86) supported the 'regurgitation' dimension of the RDQ. Overlapping factor loadings in the 'heartburn' and 'dyspepsia' dimensions suggested symptom overlap. All dimensions demonstrated high internal consistency (Cronbach's alpha: 0.79-0.90). Intra-class correlation coefficients over 4 weeks were good (0.66-0.85). The RDQ showed good responsiveness over 4 weeks of treatment, with high effect sizes (> or =0.80). Moderate or large symptom improvements were reported by 90% and 77% of HB and NHB patients, respectively, following treatment. Patients who responded to acid suppression also experienced symptom benefits in all RDQ dimensions. CONCLUSIONS:The RDQ is reliable, valid and responsive to change in HB and NHB patients. The symptom overlap is important but need not play a major role in determining treatment strategy as both patient groups benefited from proton pump inhibitor treatment.
journal_name
Aliment Pharmacol Therjournal_title
Alimentary pharmacology & therapeuticsauthors
van Zanten SV,Armstrong D,Barkun A,Junghard O,White RJ,Wiklund IKdoi
10.1111/j.1365-2036.2007.03271.xsubject
Has Abstractpub_date
2007-05-01 00:00:00pages
1087-97issue
9eissn
0269-2813issn
1365-2036pii
APT3271journal_volume
25pub_type
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journal_title:Alimentary pharmacology & therapeutics
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