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    Are There Any Clues to Predict Bamboo Spine in Axial Spondyloarthritis?
    (Wiley, 2020) Atagunduz, Pamir; Kiraz, Sedat; Akar, Servet; Kucuksahin, Orhan; Erden, Abdulsamet; Coskun, Nihan; Yagiz, Burcu
    [Abstract Not Available]
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    Clinical Features of Takayasu's Arteritis from an Inception Cohort: Early Disease Is Characterized By 'systemic Inflammation'
    (Wiley, 2016) Alibaz-Oner, Fatma; Unal, Ali Ugur; Onat, Ahmet Mesut; Kisacik, Bunyamin; Zengin, Orhan; Karadag, Omer; Erden, Abdulsamet
    [Abstract Not Available]
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    The predictors of paradoxical reactions, especially psoriasis, to biologic therapy-findings from the TReasure database: a 5-year follow-up study
    (Oxford Univ Press, 2023) Yagiz, Burcu; Lermi, Nihal; Coskun, Belkis N.; Dalkilic, Ediz; Kiraz, Sedat; Erden, Abdulsamet; Ertenli, Ihsan
    Objectives The objectives of this study were to assess the clinical characteristics, predictive factors, and practical algorithms of paradoxical reactions (PRs), specifically paradoxical psoriasis (PP). Methods The TReasure database is a web-based prospective observational cohort comprised of patients with RA and SpA from 17 centres around Turkey since 2017. A cohort study and a case-control study nestled within the cohort were identified. Results In total, 2867 RA and 5316 SpA patients were evaluated. The first biologic agent was found to have caused PRs in 60% of the 136 patients (1.66%) who developed the PRs. The median time interval between the PRs and biological onset was 12 months (range 1-132 months, mean 21 months). The most common types of PP, constituting 92.6% of PRs, were pustular (60.3%) and palmoplantar (30.9%). Adalimumab (30.9%), infliximab (19%) and etanercept (17.4%) were the most common agents causing the PP. In the treatment of most PP patients (73.2%), switching biologic agents was favoured, with TNF inhibitor (TNFi) chosen in 46.03% and non-TNFi in 26.9% of cases. The three most frequently selected drugs were etanercept (24.6%), secukinumab (9.5%) and adalimumab (8.7%). Only 5.17% of patients who switched to another TNFi showed progression. The odds ratios (s) for SSZ, HCQ, and LEF use were significantly higher in RA controls than in PP patients (P = 0.033, OR = 0.15; P = 0.012, OR = 0.15; and P = 0.015, OR = 0.13, respectively). In the PP group with SpA, the number of smokers was significantly higher (P = 0.003, OR: 2.0, 95% CI: 1.05, 3.81). Conclusion Contrary to expectations based on earlier research suggesting that paradoxical reactions develop with the class effect of biological agents, the response of patients who were shifted to another TNFi was favourable.
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    SMOKING MAY BE RELATED TO SACROILIITIS IN ENTEROPATHIC ARTHRITIS PATIENTS: TREASURE REAL-LIFE PRELIMINARY DATA
    (Bmj Publishing Group, 2019) Kucuksahin, Orhan; Erden, Abdulsamet; Ilgen, Ufuk; Kiraz, Sedat; Ertenli, Ali Ihsan; Bilge, Nazife Sule Yasar; Kasifoglu, Timucin
    [Abstract Not Available]
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    Tuberculin Skin Test and Quantiferon®-TB Gold In-Tube Test for Latent Tuberculosis Before Biologic Treatments: Lower Agreement Rate in Spondyloarthropathies Compared to Rheumatoid Arthritis
    (Wiley, 2019) Ilgen, Ufuk; Turan, Sezin; Emmungil, Hakan; Sari, Alper; Erden, Abdulsamet; Kilic, Levent; Karadag, Omer
    [Abstract Not Available]
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    Tuberculin skin test before biologic and targeted therapies: does the same rule apply for all?
    (Springer Heidelberg, 2022) Ilgen, Ufuk; Karadag, Omer; Emmungil, Hakan; Kucuksahin, Orhan; Koca, Suleyman Serdar; Erden, Abdulsamet; Bes, Cemal
    This study aimed to compare Tuberculin Skin Test (TST) and QuantiFERON (R)-TB Gold In-Tube (QFT-GIT) test in rheumatoid arthritis (RA) and spondyloarthritis (SpA) patients scheduled for biological and targeted synthetic disease modifying anti-rheumatic drugs (DMARDs) in a Bacillus Calmette-Guerin-vaccinated population. Adult RA (n = 206) and SpA (n = 392) patients from the TReasure database who had both TST and QFT-GIT prior to initiation of biological and targeted synthetic DMARDs were included in the study. Demographic and disease characteristics along with pre-biologic DMARD and steroid use were recorded. The distribution of TST and performance with respect to QFT-GIT were compared between RA and SpA groups. Pre-biologic conventional DMARD and steroid use was higher in the RA group. TST positivity rates were 44.2% in RA and 69.1% in SpA for a 5 mm cutoff (p < 0.001). Only 8.9% and 15% of the patients with RA and SpA, respectively, tested positive by QFT-GIT. The two tests poorly agreed in both groups at a TST cutoff of 5 mm and increasing the TST cutoff only slightly increased the agreement. Among age, sex, education and smoking status, pre-biologic steroid and conventional DMARD use, disease group, and QFT-GIT positivity, which were associated with a 5 mm or higher TST, only disease group (SpA) and QFT-GIT positivity remained significant in multiple logistic regression. TST positivity was more pronounced in SpA compared to that in RA and this was not explainable by pre-biologic DMARD and steroid use. The agreement of TST with QFT-GIT was poor in both groups. Using a 5 mm TST cutoff for both diseases could result in overestimating LTBI in SpA.