Validity of a Work Productivity and Activity Impairment questionnaire for patients with symptoms of gastro-esophageal reflux disease (WPAI-GERD)--results from a cross-sectional study

Value in Health : the Journal of the International Society for Pharmacoeconomics and Outcomes Research
P WahlqvistIngela Wiklund

Abstract

To validate a Work Productivity and Activity Impairment questionnaire (WPAI-GERD) developed to measure lost productivity due to symptoms of gastro-esophageal reflux disease (GERD). The WPAI-GERD was administered along with two quality-of-life questionnaires, Quality of Life in Reflux and Dyspepsia (QOLRAD) and Short Form 36 (SF-36), to a Swedish working population (N = 136) visiting a general practitioner for symptoms attributed to GERD. Correlation coefficients were calculated between each productivity variable derived from the WPAI-GERD and symptom severity, symptom frequency, quality of life dimensions, age, and gender. Statistical tests were carried out to determine the relationship between each productivity variable and the severity of heartburn. High correlations (range: 0.30-0.75) were found between productivity and symptom severity as well as between productivity and quality-of-life dimensions related to work and daily activities. The results demonstrated the ability of the questionnaire to discriminate between different grades of heartburn severity. On average, patients with heartburn reported 2.5 hours absence from work, 23% reduced productivity while at work, and 30% reduced productivity while doing regular daily act...Continue Reading

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Jul 27, 2007·Journal of Occupational Rehabilitation·Alyssa B Schultz, Dee W Edington
Mar 26, 2005·Quality of Life Research : an International Journal of Quality of Life Aspects of Treatment, Care and Rehabilitation·Nicholas J Talley, Ingela Wiklund
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