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Patient-centred outcome measures such as the Short Form-36 (SF-36) have been developed to assess the impact of ill health and medical interventions on self-reported health status. The objective of the study was to assess the impact of gastrointestinal disease upon health status as measured by the SF-36 physical and mental health component scores (PCS and MCS) and to assess whether these component scores might be an appropriate outcome measure for use in clinical research in gastroenterology. The subjects were 364 patients aged between 18 and 64 years who had been prescribed proton pump inhibitors (PPIs) by general practitioners in Oxfordshire. The general practices participating identified patients who had been prescribed PPIs. The data were abstracted from the general practice medical records of these patients concerning gastrointestinal diagnoses and other prescribed medications. The patients were sent the SF-36 questionnaire by post and the PCS and MCS scores were derived, which were adjusted for age and sex and compared with the scores of the general population of the Oxford region. Co-morbidity was assessed by the extent to which non-gastric medications were also used. The commonest diagnoses were oesophagitis/gastro-oesophageal reflux and indigestion. People with these diagnoses had significantly lower health status than the general population. Differences persisted when the results were controlled for the possible effects of co-morbidity. It was concluded that the SF-36 is sensitive to the impact of gastrointestinal disease on health status.

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