Objectives. To explore the concept of work instability (WI), a state in which the consequences of a mismatch between an individual's functional abilities and the demands of his or her job could threaten continuing employment if not resolved, in people with rheumatoid arthritis (RA). To develop the Work Instability Scale (WIS). Methods. WI in people with RA was explored through qualitative interviews, which were then used to generate items for the WIS. Results. Through Rasch analysis and validation against a gold standard of expert vocational assessment, a short 23-item, self administered, RA WIS was developed. Conclusion. The WIS can be scored in 3 bands indicating low, medium, and high risk of work disability.

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This paper argues for a consistent and new design-specific disciplinary framework that will provide a better understanding of emergent design practice. Design today is characterised by a blurring of traditional design domains (Sanders 2006) and design activities that are backed by other subject specialist areas such as computing, electronics or bioengineering. In order to understand and facilitate collaborative working, a consistent disciplinary framework is required. Furthermore, in understanding complex disciplinary influences this framework provides a method of delineating and analysing emergent practice. To derive the framework this paper explores the existing literature on disciplinary terms. Contemporary creative design practice is then analysed via this taxonomy. To this end, the paper argues that through consistent use of the terms, 'multidisciplinary design', 'crossdisciplinary design', 'interdisciplinary design' and 'transdisciplinary design', distinctions can be made within the increasingly complex domain of contemporary design practice.

Background: The Work Instability Scale for Rheumatoid Arthritis (RA-WIS) is established and is used by physicians to identify patients at risk of job loss for rapid intervention. The study objective was to explore the concept of Work Instability (a mismatch between an individual's abilities and job demands) in Ankylosing Spondylitis (AS) and develop a Work Instability Scale specific to this population.