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    INCREASED PREVALENCE OF SCOLIOSIS IN PSORIATIC ARTHRITIS: A CROSS-SECTIONAL CASE-CONTROL STUDY
    (2025) Gözükara Bag, Harika Gözde; Ergen, Emre; Yolbas, Servet; Aydogdu, Mesude Seda; Kaya, Zeynep; Zontul, Sezgin; İnanç, Elif
    Aim: Psoriatic arthritis (PsA) is expected to cause an increased risk of scoliosis because it affects the axial skeleton asymmetrically. In this study, we compared the frequency of scoliosis in PsA patients with that in healthy controls (HC) and axial spondyloarthritis (axSpA) patients. Thus, we aimed to explore whether scoliosis might be a clinical feature of PsA and to assess its potential role in differentiating PsA from axSpA. Material and Methods: The study included 60 PsA patients, 60 axSpA patients and 40 HC. All individu-als in the study were assessed for the presence of scoliosis by physical examination. Scoliosis radiog-raphy was performed in those with a positive scoliosis test on physical examination. The Cobb angle was measured using the appropriate method. A two-tailed significance level of 0.05 was considered in all analyses. Results: Within this research, the frequency of scoliosis in PsA patients was compared with the axSpA and HC groups. The Cobb angle value was notably higher in the PsA group compared to axSpA and HC (p=0.006 and p=0.007, respectively). On physical examination, scoliosis findings and coronal spinal curvature, were observed at elevated rates in the PsA group relative to the other two groups (p>0.05 for all, indicating no statistical significance). Scoliosis was more frequent in the PsA group than in the axSpA group (p=0.046). All scoliosis cases in PsA were in mild or moderate severity. Conclusion: Both the frequency of scoliosis and Cobb angle values were greater in PsA than those in axSpA. This outcome may be associated with the asymmetric involvement of lateral spinal structures typical of PsA. Overall, these results indicate that scoliosis could serve as a supportive marker for PsA and may aid in differentiating PsA from axSpA.
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    The Effect of Clinical Knowledge on the Evaluation of Sacroiliac Joint Radiography in Patients with Spondyloarthritis
    (Mdpi, 2025) Zontul, Sezgin; Kaya, Zeynep; Aydogdu, Mesude Seda; Arslan, Ahmet Kadir; Inanc, Elif; Maras Ozdemir, Zeynep; Yolbas, Servet
    Background/Objectives: This study investigates whether a patient's clinical status influences the evaluation of sacroiliac joint (SIJ) radiographs. Methods: The study involved analysing SIJ radiographs of patients diagnosed with spondyloarthritis (SpA) at our clinic. Two rheumatologists working at another centre evaluated the images independently. Three months were allowed to elapse so that the rheumatologists would forget the results of the first evaluation. The radiographs were then re-evaluated in a different order by the same rheumatologists. However, during the second evaluation, the evaluators were also provided with general clinical information about the patients. Inter- and intra-observer agreement were assessed. Results: In the first blinded evaluation of our study, we found moderate-to-substantial agreement between rheumatologists (right kappa: 0.534; p < 0.001; left kappa: 0.609; p < 0.001) and statistically significant interpretation agreement. In the second evaluation, we observed an increase in agreement (kappa increased from 0.534 to 0.774 for the right SIJ and from 0.609 to 0.855 for the left SIJ), and these metrics were also significant. Conclusions: The interpretation of SIJ radiographs showed notable inter-observer variability in the absence of clinical information. Incorporating clinical context significantly improved the agreement between readers. As conventional radiography remains central to spondyloarthritis classification, these findings highlight the value of clinical data in enhancing the reliability of radiographic assessment. To our knowledge, this is the first study to systematically demonstrate the impact of clinical information on inter-observer agreement in SIJ radiograph interpretation.