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Steiner, Martina; del Mar Esteban-Ortega, Maria; Thuissard-Vasallo, Israel; García-Lozano, Isabel; García-González, Alejandro Javier; Pérez-Blázquez, Eugenio; Sambricio, Javier; García-Aparicio, Ángel; Casco-Silva, Bruno Francisco; Sanz-Sanz, Jesús; Valdés-Sanz, Nuria; Fernández-Espartero, Cruz; Díaz-Valle, Teresa; Gurrea-Almela, María; Fernández-Melón, Julia; Gómez-Resa, María; Pato-Cour, Esperanza; Díaz-Valle, David; Méndez-Fernández, Rosalía; Navío, Teresa; Moriche-Carretero, Manuel; Muñoz-Fernández, Santiago
Journal of clinical rheumatology, 06/2024, Volume: 30, Issue: 4Journal Article
OBJECTIVEChoroidal thickness (CT) has been evaluated as a marker of systemic inflammation in ankylosing spondylitis (AS). This study evaluates the CT of AS patients before and after 6 months of biological treatment. METHODSThis longitudinal multicenter study evaluated CT in 44 AS patients. The correlations between CT and C-reactive protein (CRP) with disease activity indices were calculated. The concordance between CT and CRP was determined. We assessed factors associated with response to treatment. Clinically important improvement was defined as a decrease in Ankylosing Spondylitis Disease Activity Score of 1.1 points or greater. RESULTSForty-four eyes in patients aged 18 to 65 years were included. Mean CT values were significantly higher at baseline than after 6 months of treatment (baseline355.28 ± 80.46 μm; 6 months341.26 ± 81.06 μm; p < 0.001). There was a 95% concordance between CT and CRP at baseline and 6 months. Clinically important improvement was associated with lower baseline CT and age as independent factors (odds ratios, 0.97 95% confidence interval, 0.91–0.93; p = 0.009 and 0.81 95% confidence interval, 0.7–0.95; p = 0.005), with baseline CT of less than 374 μm (sensitivity 78%, specificity 78%, area under the curve 0.70, likelihood ratio 3.6). CONCLUSIONSChoroidal thickness decreased significantly after 6 months of biological treatment in all treatment groups. Choroidal thickness and CRP had a 95% concordance. A high CT was associated with a risk of biological treatment failure. Choroidal thickness can be considered a useful biomarker of inflammation and a factor associated with response to treatment in AS.
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