{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T23:59:19Z","timestamp":1790553559814,"version":"4.1.0"},"reference-count":29,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2017,6,9]],"date-time":"2017-06-09T00:00:00Z","timestamp":1496966400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100004319","name":"Pfizer","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100004319","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Arthritis Care &amp; Research"],"published-print":{"date-parts":[[2017,7]]},"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p>To evaluate the course of spinal radiographic progression for up to 8 years of followup in a large cohort of ankylosing spondylitis (AS) patients treated with tumor necrosis factor (TNF) inhibitors.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Consecutive patients from the Groningen Leeuwarden AS cohort starting TNF inhibitors between 2004 and 2012 were included. Baseline and biannual radiographs were randomized with radiographs of TNF\u2010naive AS patients and scored in chronologic order according to modified Stoke Ankylosing Spondylitis Spine Score (mSASSS). The course of radiographic progression (linear or nonlinear) was investigated using generalized estimating equations. Primary analysis was performed in patients with complete data over 4, 6, and 8 years of followup. Sensitivity analysis was performed after single linear imputation of missing radiographic data and after adjusting for patient characteristics with possible influence on radiographic progression.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>At baseline, median mSASSS of 210 included AS patients was 2.8 (interquartile range 0.0\u201312.0), mean\u2009\u00b1\u2009SD mSASSS 10.0\u2009\u00b1\u200915.5. During the first 4 years, radiographic progression followed a linear course (estimated mean progression rate was 1.7 for 0\u20132 and 2\u20134 years). A deflection from a linear course was found in patients with complete and imputed data over 6 and 8 years. The estimated mean 2\u2010year progression rate reduced from 2.3 to 0.8 in patients with complete 8\u2010year data. The same pattern was found after adjustment for baseline mSASSS scores, presence of syndesmophytes, sex, HLA\u2013B27 status, age, symptom duration, smoking duration, body mass index, disease activity, and nonsteroidal antiinflammatory drug use.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>This observational cohort study in AS patients receiving long\u2010term TNF inhibitors showed a reduction in spinal radiographic progression after more than 4 years of followup.<\/jats:p><\/jats:sec>","DOI":"10.1002\/acr.23097","type":"journal-article","created":{"date-parts":[[2016,10,7]],"date-time":"2016-10-07T08:59:52Z","timestamp":1475830792000},"page":"1011-1019","source":"Crossref","is-referenced-by-count":83,"title":["Reduction in Spinal Radiographic Progression in Ankylosing Spondylitis Patients Receiving Prolonged Treatment With Tumor Necrosis Factor Inhibitors"],"prefix":"10.1002","volume":"69","author":[{"given":"Fiona","family":"Maas","sequence":"first","affiliation":[{"name":"University Medical Center Groningen, University of Groningen Groningen The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Suzanne","family":"Arends","sequence":"additional","affiliation":[{"name":"University Medical Center Groningen, University of Groningen, Groningen, and Medical Center Leeuwarden Leeuwarden The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elisabeth","family":"Brouwer","sequence":"additional","affiliation":[{"name":"University Medical Center Groningen, University of Groningen Groningen The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ivette","family":"Essers","sequence":"additional","affiliation":[{"name":"Maastricht University Medical Center Maastricht The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eveline","family":"van der Veer","sequence":"additional","affiliation":[{"name":"University Medical Center Groningen, University of Groningen Groningen The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Monique","family":"Efde","sequence":"additional","affiliation":[{"name":"Medical Center Leeuwarden Leeuwarden The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peter M. A.","family":"van Ooijen","sequence":"additional","affiliation":[{"name":"University Medical Center Groningen, University of Groningen Groningen The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rinze","family":"Wolf","sequence":"additional","affiliation":[{"name":"Medical Center Leeuwarden Leeuwarden The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nic J. G. 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