<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">rsp</journal-id><journal-title-group><journal-title xml:lang="ru">Научно-практическая ревматология</journal-title><trans-title-group xml:lang="en"><trans-title>Rheumatology Science and Practice</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1995-4484</issn><issn pub-type="epub">1995-4492</issn><publisher><publisher-name>IMA-PRESS, LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.14412/1995-4484-2012-1188</article-id><article-id custom-type="elpub" pub-id-type="custom">rsp-1102</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Articles</subject></subj-group></article-categories><title-group><article-title>О НЕКОТОРЫХ ПОДХОДАХ К КОЛИЧЕСТВЕННОЙ ОЦЕНКЕ СНИЖЕНИЯ ПРОИЗВОДИТЕЛЬНОСТИ ТРУДА ПРИ РЕВМАТИЧЕСКИХ ЗАБОЛЕВАНИЯХ</article-title><trans-title-group xml:lang="en"><trans-title>SOME APPROACHES TO QUANTITATIVE EVALUATION OF REDUCED PRODUCTIVITY IN SUBJECTS WITH RHEUMATIC DISEASES</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Krichevskaya</surname><given-names>Olga Arkadyevna</given-names></name><name name-style="western" xml:lang="en"><surname>Krichevskaya</surname><given-names>Olga Arkadyevna</given-names></name></name-alternatives><email xlink:type="simple">4101878@mail.ru</email></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Vakulenko</surname><given-names>O Yu</given-names></name><name name-style="western" xml:lang="en"><surname>Vakulenko</surname><given-names>O Yu</given-names></name></name-alternatives><email xlink:type="simple">-</email></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Goryachev</surname><given-names>D V</given-names></name><name name-style="western" xml:lang="en"><surname>Goryachev</surname><given-names>D V</given-names></name></name-alternatives><email xlink:type="simple">-</email></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Эрдес</surname><given-names>Ш. Ф.</given-names></name><name name-style="western" xml:lang="en"><surname>Erdes</surname><given-names>Sh F</given-names></name></name-alternatives><email xlink:type="simple">-</email></contrib></contrib-group><pub-date pub-type="collection"><year>2012</year></pub-date><pub-date pub-type="epub"><day>15</day><month>10</month><year>2012</year></pub-date><volume>50</volume><issue>5</issue><issue-title>№5 (2012)</issue-title><fpage>90</fpage><lpage>97</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Krichevskaya O.A., Vakulenko O.Y., Goryachev D.V., Эрдес Ш.Ф., 2012</copyright-statement><copyright-year>2012</copyright-year><copyright-holder xml:lang="ru">Krichevskaya O.A., Vakulenko O.Y., Goryachev D.V., Эрдес Ш.Ф.</copyright-holder><copyright-holder xml:lang="en">Krichevskaya O.A., Vakulenko O.Y., Goryachev D.V., Erdes S.F.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://rsp.mediar-press.net/rsp/article/view/1102">https://rsp.mediar-press.net/rsp/article/view/1102</self-uri></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">&lt;div&gt;&lt;p&gt;Sokka T., Kautiainen H., Pincus T. et al. Work disability remains a major problem in rheumatoid arthritis in the 2000s: data from 32 countries in the QUEST-RA study. Arthr Res Ther 2010; 12: R42.&lt;/p&gt;&lt;p&gt;Chung C.P., Sokka T., Arbogast P.G. et al. Work disability in early rheumatoid arthritis: higher rates but better clinical status in Finland compared with the US. Ann Rheum Dis 2006; 65: 1653-7.&lt;/p&gt;&lt;p&gt;Рациональная фармакотерапия ревматических заболеваний. Под ред. В.А. Насоновой, Е.Л. Насонова. М.: Литтерра, 2003: 17—8.&lt;/p&gt;&lt;p&gt;Minier T., Pentek M., Brodszky V. et al. Cost-of-illness of patients with systemic sclerosis in a tertiary care centre. Rheumatology (Oxford) 2010; 49(10): 1920—8.&lt;/p&gt;&lt;p&gt;Aghdassi E., Zhang W., St-Pierre Y. et al. Healthcare cost and loss of productivity in a Canadian population of patients with and without lupus nephritis. J Rheumatol 2011; 38(4): 658—66.&lt;/p&gt;&lt;p&gt;Edwards N.L., Sundy J.S., Forsythe A. et al. Work productivity loss due to flares in patients with chronic gout refractory to conventional therapy. J Med Econ 2011; 14(1): 10—5.&lt;/p&gt;&lt;p&gt;Rohekar S., Pope J. Assessment of work disability in seronegative spondyloarthritis. Clin Exp Rheumatol 2010; 28(1): 35—40&lt;/p&gt;&lt;p&gt;Healey E.L., Haywood K.L., Jordan K.P. et al. Impact of ankylosing spondylitis on work in patients across the UK. Scand J Rheumatol 2011; 40(1): 34—40.&lt;/p&gt;&lt;p&gt;Geuskens G.A., Hazes J.M., Barendregt P.J. et al. Work and sick leave among patients with early inflammatory joint conditions. Arthr Rheum 2008; 59: 1458-66.&lt;/p&gt;&lt;p&gt;Merkesdal S., Ruof J., Schoffski O. et al. Indirect medical costs in early rheumatoid arthritis: composition of and changes in indirect costs within the first three years of disease. Arthr Reum 2001; 44: 528-34.&lt;/p&gt;&lt;p&gt;Burton W., Morrison A., Maclean R., Ruderman E. Systematic review of studies of productivity loss due to rheumatoid arthritis. Occup Med (Lond) 2006; 56(1): 18—27.&lt;/p&gt;&lt;p&gt;Verstappen S.M.M., Bijlsma J.W., Verkleij H. et al. Overview of work disability in rheumatoid arthritis patients as observed in cross-sectional and longitudinal surveys. Arthr Rheum 2004; 51: 488-97.&lt;/p&gt;&lt;p&gt;Wolfe F., Michaud K., Choi H.K., Williams R. Household income and earnings losses among 6,396 persons with rheumatoid arthritis. J Rheumatol 2005; 32(10): 1875—83.&lt;/p&gt;&lt;p&gt;Mau W., Listing J., Huscher D. et al. Employment across chronic inflammatory rheumatic diseases and comparison with the general population. J Rheumatol 2005; 32: 721-8.&lt;/p&gt;&lt;p&gt;Verstappen S.M.M., Watson K.D., Lunt M. et al. Working status in patients with rheumatoid arthritis, ankylosing spondylitis and psoriatic arthritis: results from the British Society for Rheumatology Biologics Register. Rheumatology (Oxford) 2010; 49(8): 1570-7.&lt;/p&gt;&lt;p&gt;Verstappen S.M.M., Boonen A., Verkleij H. et al. Productivity costs among patients with rheumatoid arthritis: the influence of methods and sources to value loss of productivity. Ann Rheum Dis 2005; 64: 1754-60.&lt;/p&gt;&lt;p&gt;Zhang W., Anis A.H. The economic burden of rheumatoid arthritis: beyond health care costs. Clin Rheumatol 2011; 30(Suppl. 1): S25- S32.&lt;/p&gt;&lt;p&gt;Davis K., Collins S.R., Doty M.M. et al. Health and productivity among U.S. workers. Issue Brief (Commonw Fund) 2005; 856: 1-10.&lt;/p&gt;&lt;p&gt;Goetzel R.Z., Long S.R., Ozminkowski R.J. et al. Health, absence, disability, and presenteeism cost estimates of certain physical and mental health conditions affecting U.S. employers. J Occup Environ Med 2004; 46(4): 398-412.&lt;/p&gt;&lt;p&gt;Mitchell R.J., Bates M.P.H. Measuring health-related productivity loss. Population Health Management 2011; 2(14): 93-8.&lt;/p&gt;&lt;p&gt;Berger A., Hartrick C., Edelsberg J. et al. Direct and indirect economic costs amond private-sector employees with osteoarthritis. J Occup Environ Med 2011, Oct 20 [Epub. ahead of print].&lt;/p&gt;&lt;p&gt;Mattke S., Balakrishnan A., Bergamo G. et al. A review of methods to measure health-related productivity loss. Am J Manag Care 2007; 13(4): 211-7.&lt;/p&gt;&lt;p&gt;Ter Wee M.M., Lems W.F., Usan H. et al. The effect of biological agents on work participation in rheumatoid arthritis patients: a systematic review. Ann Rheum Dis 2011, Oct 13 [Epub. ahead of print].&lt;/p&gt;&lt;p&gt;Van Roijen L., Essink-Bot M.L., Koopmanschap M.A. et al. Labor and health status in economio evaluation of health care. The Health and Labor Questionnaire. Int J Technol Assess Health Care 1996; 12: 405-15.&lt;/p&gt;&lt;p&gt;Boonen A., Brinkhuizen T., Landewe R. et al. Impact of ankylosing spondylitis on sick leave, presenteeism and unpaid productivity, and estimation of the societal cost. Ann Rheum Dis 2010; 69(6): 1123-8.&lt;/p&gt;&lt;p&gt;Gladman D.D., Bombardier C., Thorne C. et al. Effectiveness and safety of etanercept in patients with psoriatic arthritis in a Canadian clinical practice setting: the REPArE trial. J Rheumatol 2011; 38(7): 1355-62.&lt;/p&gt;&lt;p&gt;Zhang W., Bansback N., Guh D. et al. Short-term influence of adalimumab on work productivity outcomes in patients with rheumatoid arthritis. J Rheumatol 2008; 35(9): 1729—36.&lt;/p&gt;&lt;p&gt;Lerner D., Amick B.C. 3rd, Rogers W.H. et al. The Work Limitations Questionnaire. Med Care 2001; 38: 72-85.&lt;/p&gt;&lt;p&gt;Walker N., Michaud K., Wolfe F. Work limitations among working persons with rheumatoid arthritis: results, reliability, and validity of the work limitations questionnaire in 836 patients. J Rheumatol 2005; 32(6): 1006-12.&lt;/p&gt;&lt;p&gt;Kessler R.C., Barber C., Beek A. et al. The World Health Organization Health and Work Performance Questionnaire (HPQ). J Occup Environ Med 2003; 45: 156-74.&lt;/p&gt;&lt;p&gt;Wang P.S., Beck A., Berglund P. et al. Chronic medical conditions and work performance in the health and work performance questionnaire calibration surveys. J Occup Environ Med 2003; 45(12): 1303—11.&lt;/p&gt;&lt;p&gt;Reilly M.C., Zbrozek A.S., Dukes E.M. The validity and reproducibility of a work productivity and activity impairment instrument. Pharmaeconomics 1993; 4(5): 353—65.&lt;/p&gt;&lt;p&gt;Zhang W., Gignac M.A., Beaton D. et al. Productivity loss due to presenteeism among patients with arthritis: estimates from 4 instruments. J Rheumatol 2010; 37(9): 1805—14.&lt;/p&gt;&lt;p&gt;Prasad M., Wahlqvist P., Shikiar R. et al. A review of self-report instruments measuring health-related work productivity: a patient-reported outcomes perspective. Pharmacoeconomics 2004; 22(4): 225-44.&lt;/p&gt;&lt;p&gt;www.reillyassociates.net&lt;/p&gt;&lt;p&gt;Reilly M.C., McBurney C.R., Bracco A. Work absenteeism in IBS: measuring days versus hours missed. Presented ISPOR 8th Annual European Congress, Nov 6—8, 2005, Florence, Italy.&lt;/p&gt;&lt;p&gt;Zhang W., Bansback N., Boonen A. et al. Validity of the work productivity and activity impairment questionnaire - general health version in patients with rheumatoid arthritis. Arthr Res Ther 2010; 12: R177.&lt;/p&gt;&lt;p&gt;Khandker R., Pinheiro G., Kay S. et al. Moderate to severe rheumatoid arthritis is associated with significant work and activity impairment in Brazil: findings from an observational study. Arthr Rheum 2009; 60 (Abstr. suppl.): 1852.&lt;/p&gt;&lt;p&gt;Radner H., Smolen J., Aletaha D. Remission of rheumatoid arthritis: benefits from socioeconomic and quality of life perspectives. Arthr Rheum 2009; 60 (Abstr. suppl.): 1382.&lt;/p&gt;&lt;p&gt;www.ispor.org/research_study_digest/research_index.asp&lt;/p&gt;&lt;p&gt;www.clinicaltrials.gov/ct2/show/NCT01405326 REstore Working Ability in RheumatoiD Arthritis (REWARD)&lt;/p&gt;&lt;p&gt;DiBonaventura M., Gupta S., McDonald V. et al. Evaluating the health and economic impact of osteoarthritis pain in the workforce: results from the National Health and Wellness Survey. BMC Musculoskelet Disord 2011; 12: 83.&lt;/p&gt;&lt;p&gt;Reilly M.C., Gooch K.L., Wong R.L. et al. Validity, reliability and responsiveness of the work productivity and activity impairment questionnaire in ankylosing spondylitis. Rheumatology (Oxford) 2010; 49(4): 812-9.&lt;/p&gt;&lt;p&gt;Gooch K., Dougados M., van der Heijde D. et al. Relationship between spondyloarthropathies and impaired work productivity. Ann Rheum Dis 2009; 68(Suppl. 3): 356.&lt;/p&gt;&lt;p&gt;Maksymowych W.P., Gooch K.L., Wong R.L. et al. Impact of age, sex, physical function, health-related quality of life, and treatment with adalimumab on work status and work productivity of patients with ankylosing spondylitis. J Rheumatol 2010; 37: 2.&lt;/p&gt;&lt;/div&gt;&lt;br /&gt;</mixed-citation><mixed-citation xml:lang="en">&lt;div&gt;&lt;p&gt;Sokka T., Kautiainen H., Pincus T. et al. Work disability remains a major problem in rheumatoid arthritis in the 2000s: data from 32 countries in the QUEST-RA study. Arthr Res Ther 2010; 12: R42.&lt;/p&gt;&lt;p&gt;Chung C.P., Sokka T., Arbogast P.G. et al. Work disability in early rheumatoid arthritis: higher rates but better clinical status in Finland compared with the US. Ann Rheum Dis 2006; 65: 1653-7.&lt;/p&gt;&lt;p&gt;Рациональная фармакотерапия ревматических заболеваний. Под ред. В.А. Насоновой, Е.Л. Насонова. М.: Литтерра, 2003: 17—8.&lt;/p&gt;&lt;p&gt;Minier T., Pentek M., Brodszky V. et al. Cost-of-illness of patients with systemic sclerosis in a tertiary care centre. Rheumatology (Oxford) 2010; 49(10): 1920—8.&lt;/p&gt;&lt;p&gt;Aghdassi E., Zhang W., St-Pierre Y. et al. Healthcare cost and loss of productivity in a Canadian population of patients with and without lupus nephritis. J Rheumatol 2011; 38(4): 658—66.&lt;/p&gt;&lt;p&gt;Edwards N.L., Sundy J.S., Forsythe A. et al. Work productivity loss due to flares in patients with chronic gout refractory to conventional therapy. J Med Econ 2011; 14(1): 10—5.&lt;/p&gt;&lt;p&gt;Rohekar S., Pope J. Assessment of work disability in seronegative spondyloarthritis. Clin Exp Rheumatol 2010; 28(1): 35—40&lt;/p&gt;&lt;p&gt;Healey E.L., Haywood K.L., Jordan K.P. et al. Impact of ankylosing spondylitis on work in patients across the UK. Scand J Rheumatol 2011; 40(1): 34—40.&lt;/p&gt;&lt;p&gt;Geuskens G.A., Hazes J.M., Barendregt P.J. et al. Work and sick leave among patients with early inflammatory joint conditions. Arthr Rheum 2008; 59: 1458-66.&lt;/p&gt;&lt;p&gt;Merkesdal S., Ruof J., Schoffski O. et al. Indirect medical costs in early rheumatoid arthritis: composition of and changes in indirect costs within the first three years of disease. Arthr Reum 2001; 44: 528-34.&lt;/p&gt;&lt;p&gt;Burton W., Morrison A., Maclean R., Ruderman E. Systematic review of studies of productivity loss due to rheumatoid arthritis. Occup Med (Lond) 2006; 56(1): 18—27.&lt;/p&gt;&lt;p&gt;Verstappen S.M.M., Bijlsma J.W., Verkleij H. et al. Overview of work disability in rheumatoid arthritis patients as observed in cross-sectional and longitudinal surveys. Arthr Rheum 2004; 51: 488-97.&lt;/p&gt;&lt;p&gt;Wolfe F., Michaud K., Choi H.K., Williams R. Household income and earnings losses among 6,396 persons with rheumatoid arthritis. J Rheumatol 2005; 32(10): 1875—83.&lt;/p&gt;&lt;p&gt;Mau W., Listing J., Huscher D. et al. Employment across chronic inflammatory rheumatic diseases and comparison with the general population. J Rheumatol 2005; 32: 721-8.&lt;/p&gt;&lt;p&gt;Verstappen S.M.M., Watson K.D., Lunt M. et al. Working status in patients with rheumatoid arthritis, ankylosing spondylitis and psoriatic arthritis: results from the British Society for Rheumatology Biologics Register. Rheumatology (Oxford) 2010; 49(8): 1570-7.&lt;/p&gt;&lt;p&gt;Verstappen S.M.M., Boonen A., Verkleij H. et al. Productivity costs among patients with rheumatoid arthritis: the influence of methods and sources to value loss of productivity. Ann Rheum Dis 2005; 64: 1754-60.&lt;/p&gt;&lt;p&gt;Zhang W., Anis A.H. The economic burden of rheumatoid arthritis: beyond health care costs. Clin Rheumatol 2011; 30(Suppl. 1): S25- S32.&lt;/p&gt;&lt;p&gt;Davis K., Collins S.R., Doty M.M. et al. Health and productivity among U.S. workers. Issue Brief (Commonw Fund) 2005; 856: 1-10.&lt;/p&gt;&lt;p&gt;Goetzel R.Z., Long S.R., Ozminkowski R.J. et al. Health, absence, disability, and presenteeism cost estimates of certain physical and mental health conditions affecting U.S. employers. J Occup Environ Med 2004; 46(4): 398-412.&lt;/p&gt;&lt;p&gt;Mitchell R.J., Bates M.P.H. Measuring health-related productivity loss. Population Health Management 2011; 2(14): 93-8.&lt;/p&gt;&lt;p&gt;Berger A., Hartrick C., Edelsberg J. et al. Direct and indirect economic costs amond private-sector employees with osteoarthritis. J Occup Environ Med 2011, Oct 20 [Epub. ahead of print].&lt;/p&gt;&lt;p&gt;Mattke S., Balakrishnan A., Bergamo G. et al. A review of methods to measure health-related productivity loss. Am J Manag Care 2007; 13(4): 211-7.&lt;/p&gt;&lt;p&gt;Ter Wee M.M., Lems W.F., Usan H. et al. The effect of biological agents on work participation in rheumatoid arthritis patients: a systematic review. Ann Rheum Dis 2011, Oct 13 [Epub. ahead of print].&lt;/p&gt;&lt;p&gt;Van Roijen L., Essink-Bot M.L., Koopmanschap M.A. et al. Labor and health status in economio evaluation of health care. The Health and Labor Questionnaire. Int J Technol Assess Health Care 1996; 12: 405-15.&lt;/p&gt;&lt;p&gt;Boonen A., Brinkhuizen T., Landewe R. et al. Impact of ankylosing spondylitis on sick leave, presenteeism and unpaid productivity, and estimation of the societal cost. Ann Rheum Dis 2010; 69(6): 1123-8.&lt;/p&gt;&lt;p&gt;Gladman D.D., Bombardier C., Thorne C. et al. Effectiveness and safety of etanercept in patients with psoriatic arthritis in a Canadian clinical practice setting: the REPArE trial. J Rheumatol 2011; 38(7): 1355-62.&lt;/p&gt;&lt;p&gt;Zhang W., Bansback N., Guh D. et al. Short-term influence of adalimumab on work productivity outcomes in patients with rheumatoid arthritis. J Rheumatol 2008; 35(9): 1729—36.&lt;/p&gt;&lt;p&gt;Lerner D., Amick B.C. 3rd, Rogers W.H. et al. The Work Limitations Questionnaire. Med Care 2001; 38: 72-85.&lt;/p&gt;&lt;p&gt;Walker N., Michaud K., Wolfe F. Work limitations among working persons with rheumatoid arthritis: results, reliability, and validity of the work limitations questionnaire in 836 patients. J Rheumatol 2005; 32(6): 1006-12.&lt;/p&gt;&lt;p&gt;Kessler R.C., Barber C., Beek A. et al. The World Health Organization Health and Work Performance Questionnaire (HPQ). J Occup Environ Med 2003; 45: 156-74.&lt;/p&gt;&lt;p&gt;Wang P.S., Beck A., Berglund P. et al. Chronic medical conditions and work performance in the health and work performance questionnaire calibration surveys. J Occup Environ Med 2003; 45(12): 1303—11.&lt;/p&gt;&lt;p&gt;Reilly M.C., Zbrozek A.S., Dukes E.M. The validity and reproducibility of a work productivity and activity impairment instrument. Pharmaeconomics 1993; 4(5): 353—65.&lt;/p&gt;&lt;p&gt;Zhang W., Gignac M.A., Beaton D. et al. Productivity loss due to presenteeism among patients with arthritis: estimates from 4 instruments. J Rheumatol 2010; 37(9): 1805—14.&lt;/p&gt;&lt;p&gt;Prasad M., Wahlqvist P., Shikiar R. et al. A review of self-report instruments measuring health-related work productivity: a patient-reported outcomes perspective. Pharmacoeconomics 2004; 22(4): 225-44.&lt;/p&gt;&lt;p&gt;www.reillyassociates.net&lt;/p&gt;&lt;p&gt;Reilly M.C., McBurney C.R., Bracco A. Work absenteeism in IBS: measuring days versus hours missed. Presented ISPOR 8th Annual European Congress, Nov 6—8, 2005, Florence, Italy.&lt;/p&gt;&lt;p&gt;Zhang W., Bansback N., Boonen A. et al. Validity of the work productivity and activity impairment questionnaire - general health version in patients with rheumatoid arthritis. Arthr Res Ther 2010; 12: R177.&lt;/p&gt;&lt;p&gt;Khandker R., Pinheiro G., Kay S. et al. Moderate to severe rheumatoid arthritis is associated with significant work and activity impairment in Brazil: findings from an observational study. Arthr Rheum 2009; 60 (Abstr. suppl.): 1852.&lt;/p&gt;&lt;p&gt;Radner H., Smolen J., Aletaha D. Remission of rheumatoid arthritis: benefits from socioeconomic and quality of life perspectives. Arthr Rheum 2009; 60 (Abstr. suppl.): 1382.&lt;/p&gt;&lt;p&gt;www.ispor.org/research_study_digest/research_index.asp&lt;/p&gt;&lt;p&gt;www.clinicaltrials.gov/ct2/show/NCT01405326 REstore Working Ability in RheumatoiD Arthritis (REWARD)&lt;/p&gt;&lt;p&gt;DiBonaventura M., Gupta S., McDonald V. et al. Evaluating the health and economic impact of osteoarthritis pain in the workforce: results from the National Health and Wellness Survey. BMC Musculoskelet Disord 2011; 12: 83.&lt;/p&gt;&lt;p&gt;Reilly M.C., Gooch K.L., Wong R.L. et al. Validity, reliability and responsiveness of the work productivity and activity impairment questionnaire in ankylosing spondylitis. Rheumatology (Oxford) 2010; 49(4): 812-9.&lt;/p&gt;&lt;p&gt;Gooch K., Dougados M., van der Heijde D. et al. Relationship between spondyloarthropathies and impaired work productivity. Ann Rheum Dis 2009; 68(Suppl. 3): 356.&lt;/p&gt;&lt;p&gt;Maksymowych W.P., Gooch K.L., Wong R.L. et al. Impact of age, sex, physical function, health-related quality of life, and treatment with adalimumab on work status and work productivity of patients with ankylosing spondylitis. J Rheumatol 2010; 37: 2.&lt;/p&gt;&lt;/div&gt;&lt;br /&gt;</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
