Abstract
The availability of population-specific normative data regarding disease severity measures is essential for patient assessment. The goals of the current study were to characterize the pattern of ankylosing spondylitis (AS) in Portuguese patients and to develop reference centile charts for BASDAI, BASFI, BASMI and mSASSS, the most widely used assessment tools in AS. AS cases were recruited from hospital outpatient clinics, with AS defined according to the modified New York criteria. Demographic and clinical data were recorded. All radiographs were evaluated by two independent experienced readers. Centile charts for BASDAI, BASFI, BASMI and mSASSS were constructed for both genders, using generalized linear models and regression models with duration of disease as independent variable. A total of 369 patients (62.3% male, mean ± (SD) age 45.4 ± 13.2 years, mean ± (SD) disease duration 11.4 ± 10.5 years, 70.7% B27-positive) were included. Family history of AS in a first-degree relative was reported in 17.6% of the cases. Regarding clinical disease pattern, at the time of assessment 42.3% had axial disease, 2.4% peripheral disease, 40.9% mixed disease and 7.1% isolated enthesopatic disease. Anterior uveitis (33.6%) was the most common extra-articular manifestation. The centile charts suggest that females reported greater disease activity and more functional impairment than males but had lower BASMI and mSASSS scores. Data collected through this study provided a demographic and clinical profile of patients with AS in Portugal. The development of centile charts constitutes a useful tool to assess the change of disease pattern over time and in response to therapeutic interventions.
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Acknowledgements
We would like to thank the individuals who shared their clinical data with us to complete this study and to ANEA (Ankylosing Spondylitis Portuguese Patients Association) and to all Portuguese Rheumatologists involved in CORPOREA Study Group. This study was supported by Bolsa de Investigação da Sociedade Portuguesa de Reumatologia/Schering-Plough 2007; FCML 2007 Grant and Wyeth Lederle Portugal Grant.
CORPOREA Study Group: Centro Hospitalar de Lisboa Ocidental, Hospital de Egas Moniz EPE, Lisboa: A F Mourão, AA de Matos, C Ribeiro, FM Pimentel-Santos, J Bravo Pimentão, JC Branco, M Mateus, P Nero, P Araújo, S Falcão, TL Pinto, W Castelão. Unidade de Investigação em Reumatologia, Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa: E Vieira de Sousa, J Caetano-Lopes, JE Fonseca. Instituto Português de Reumatologia, Lisboa: C Silva, E Simões, H Madeira, H Santos, J Vaz Patto, J Ferreira, M Micaelo, MJ Mediavilla, M Sousa, Hospital Curry Cabral EPE, Lisboa: P Soares Branco. Hospital Garcia de Orta EPE, Almada: F Godinho, J Canas da Silva, S Garcês, V Tavares. Centro Hospitalar do Alto Minho, Hospital Conde de Bertiandos EPE, Ponte de Lima: A Ribeiro, D Araújo, JA Costa, L Costa, MC Afonso, M Bogas, S Alcino. Centro Hospitalar de Vila Nova de Gaia/Espinho EPE, Vila Nova de Gaia: P Pinto. Hospital de Faro EPE, Faro: AR Cravo, G Sequeira. Hospital Militar Principal, Lisboa: RA Santos. Centro Hospitalar Baixo Vouga, Hospital Infante D. Pedro EPE: A Barcelos, I Cunha. Centro Hospitalar Oeste Norte, Centro Hospitalar das Caldas da Rainha: M Cruz.
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Matthew A Brown and Jaime C Branco equally contributed to this study.
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Pimentel-Santos, F.M., Mourão, A.F., Ribeiro, C. et al. Spectrum of ankylosing spondylitis in Portugal. Development of BASDAI, BASFI, BASMI and mSASSS reference centile charts. Clin Rheumatol 31, 447–454 (2012). https://doi.org/10.1007/s10067-011-1854-7
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DOI: https://doi.org/10.1007/s10067-011-1854-7