Ankylosing spondylitis disease activity score is related to NSAID use, especially in patients treated with TNF-α inhibitors

Marlies J G Carbo, Anneke Spoorenberg, Fiona Maas, Elisabeth Brouwer, Reinhard Bos, Hendrika Bootsma, Eveline van der Veer, Freke Wink and Suzanne Arends

PLOS ONE, 2018, vol. 13, issue 4, 1-12

Abstract: Background: Non-steroidal anti-inflammatory drugs (NSAIDs) are regarded as the cornerstone of conventional treatment for AS. However little is known about concomitant NSAID use during treatment (with TNF-α inhibitors) in daily clinical practice. Methods and findings: Consecutive patients from the GLAS cohort were included. NSAID use and ASAS-NSAID index were evaluated at group level and at individual patient level during 52 weeks of follow-up. Analyses were stratified for treatment regimen. Generalized estimating equations (GEE) was used to evaluate NSAID use in relation to assessments of disease activity over time. In patients starting TNF-α inhibitors (n = 254), 79% used NSAIDs at baseline and this proportion decreased significantly to 38% at 52 weeks. ASAS-NSAID index also decreased significantly from median 65 to 0. In patients on conventional treatment (n = 139), 74% used NSAIDs at baseline with median ASAS-NSAID index of 50 and this remained stable during follow-up. At each follow-up visit, approximately half of the patients changed their type or dose of NSAIDs. GEE analysis over time showed that NSAID use was associated with AS disease activity score (p

Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0196281

DOI: 10.1371/journal.pone.0196281

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