There is a growing interest in studying the effects of arthritis on a person's work productivity using a growing variety of outcome indicators. This study looks at the development of a valid and reliable shortened version of the Workplace Activity Limitation Scale 12 (WALS-12) for assessing work productivity limitations in rheumatoid arthritis (RA) patients. To read the full article, choose Open Athens “Institutional Login” and search for “Midlands Partnership”.