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. 2009 May 20;11(3):R73. doi: 10.1186/ar2702

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Copyright © 2009 Osterhaus et al.; licensee BioMed Central Ltd.

This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Change from baseline in Work Productivity Survey – Rheumatoid Arthritis (WPS-RA) by Health Assessment Questionnaire – Disability Index (HAQ-DI) response at week 24. ^§P ≤ 0.001, **P < 0.01 responders versus non-responders; P values were obtained using the non-parametric bootstrap-t method. Rate of interference is a score on a scale of 0 to 10 points (0 = no interference and 10 = complete interference). WPS-RA recall period is 1 month. Response is defined as a decrease from weeks 0 to 24 in the HAQ-DI score of greater than or equal to the minimum clinically important difference (MCID) in absolute value. BSL, baseline; RA, rheumatoid arthritis; WP, work productivity.