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Title: Pulmonary function in ankylosing spondylitis: Association with clinical variables
Author: Brambila-Tapia, A.J.L.
Rocha-Munoz, A.D.
Gonzalez-Lopez, L.
Vazquez-Del-Mercado, M.
Salazar-Paramo, M.
Davalos-Rodriguez, I.P.
De La Cerda-Trujillo, L.
Diaz-Toscano, M.L.
Hernandez-Cuervo, P.
Diaz-Rizo, V.
Sanchez-Mosco, D.
Vazquez-Jimenez, J.C.
Cardona-Munoz, E.G.
Gamez-Nava, J.I.
Issue Date: 2013
Abstract: To evaluate the association between pulmonary function and clinical variables in ankylosing spondylitis (AS) and to compare the pulmonary function of patients with AS with that of healthy controls, 61 AS patients and 74 healthy controls were included. In AS, we assessed clinical disease indices (BASDAI, BASFI, BASG), morning stiffness, number of hypersensitive entheses, metrology measures, 6-min walking test, acute phase reactants, radiological presence of "bamboo spine," and severity of radiological involvement in sacroiliac and vertebral joints. AS and healthy controls had similar age and gender. All the parameters of pulmonary function were significantly diminished in AS than in healthy controls (p < 0.001), with a higher proportion of restrictive pattern (57.4 vs. 5.4 %). In AS, pulmonary function correlated negatively with BASDAI, BASFI, BASG, morning stiffness, number of hypersensitive entheses, occiput-wall distance, and ESR, and positively with 6-min walking test. There was no association between pulmonary function with radiological stage of vertebral joints and sacroiliac joints, "bamboo spine," disease duration, or chest expansion. A higher frequency of AS patients had a decreased pulmonary function and results of the 6-min walking test. These abnormalities in AS were more related with disease activity than with mobility limitation. � 2013 Springer-Verlag Berlin Heidelberg.
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