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Validity of the work productivity and activity impairment questionnaire - general health version in patients with rheumatoid arthritis
IntroductionThe Work Productivity and Activity Impairment (WPAI) questionnaire is a well validated instrument to measure impairments in work and activities. However, its validation among patientsExpand
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Work status and productivity costs due to ankylosing spondylitis: comparison of three European countries
Objective: To compare work disability, sick leave, and productivity costs due to ankylosing spondylitis (AS) of three European countries. Methods: 216 patients with AS from the Netherlands, France,Expand
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Prevalence of extra-articular manifestations in patients with ankylosing spondylitis: a systematic review and meta-analysis.
OBJECTIVES Uveitis, psoriasis and inflammatory bowel disease (IBD) are common extra-articular manifestations (EAM) in patients with ankylosing spondylitis (AS); however, summary data of reportedExpand
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Impact of ankylosing spondylitis on sick leave, presenteeism and unpaid productivity, and estimation of the societal cost
Aim To describe the influence of ankylosing apondylitis (AS) on sick leave, presenteeism and unpaid work restrictions and to estimate related productivity costs. Methods 142 consecutive andExpand
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The Impact of Inflammatory Bowel Disease on Labor Force Participation: Results of a Population Sampled Case-Control Study
IntroductionInflammatory bowel diseases are chronic conditions that might cause a severe impact on social life. The aim of the study was to assess employment, chronic work disability, and sick leaveExpand
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Global Prevalence of Spondyloarthritis: A Systematic Review and Meta‐Regression Analysis
To summarize the prevalence of spondyloarthritis (SpA) and its subtypes in the general population, and to identify demographic and methodologic characteristics that might explain heterogeneity inExpand
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Direct costs of ankylosing spondylitis and its determinants: an analysis among three European countries
Objective: To assess direct costs associated with ankylosing spondylitis (AS). To determine which variables, including country, predict costs. Methods: 216 patients with AS from the Netherlands,Expand
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Costs of ankylosing spondylitis in three European countries: the patient’s perspective
Objective: To assess a patient’s out of pocket costs, income loss, time consumption, and quality of life (QoL) due to ankylosing spondylitis (AS) in three European countries and to assess variablesExpand
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Patients’ preferences for osteoporosis drug treatment: a discrete-choice experiment
IntroductionThe patient’s perspective is becoming increasingly important in clinical and policy decisions. In this study, we aimed to evaluate the preferences of patients with, or at risk of,Expand
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Nominal group technique to select attributes for discrete choice experiments: an example for drug treatment choice in osteoporosis
Background: Attribute selection represents an important step in the development of discrete-choice experiments (DCEs), but is often poorly reported. In some situations, the number of attributesExpand
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