Undifferentiated Spondyloarthritis: A Longterm Followup

@article{SampaioBarros2010UndifferentiatedSA,
  title={Undifferentiated Spondyloarthritis: A Longterm Followup},
  author={Percival Degrava Sampaio-Barros and Adriana Bruscato Bortoluzzo and Roseneide Aparecida Conde and L{\'i}lian T. L. Costallat and Adil Muhib S{\^a}mara and Manoel Barros B{\'e}rtolo},
  journal={The Journal of Rheumatology},
  year={2010},
  volume={37},
  pages={1195 - 1199}
}
Objective. To analyze the longterm followup of a series of Brazilian patients with undifferentiated spondyloarthritis (uSpA). Methods. Prospective study analyzing a group of 111 patients with the diagnosis of uSpA, fulfilling the European Spondylarthropathy Study Group and the Amor criteria, who were followed for 5 to 10 years in a single university referral center. Patients had their outcome analyzed at 5, 7, and 10 years. Results. There was a predominance of men (81.1%), white ethnicity (78.4… 
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