To the Editor:
We read with interest the paper by Couderc, et al1 on the prevalence of renal impairment in patients with spondyloarthritis (SpA) from the ASASCOMOSPA study (Assessment of Spondyloarthritis international Society–COMOrbidities in SPondyloArthritis). Their results encouraged us to investigate renal impairment prevalence in our cohort. Renal impairment [estimated glomerular filtration rate (eGFR) < 60 ml/min/1.73 m2] prevalence in the ASAS-COMOSPA cohort was 5.2% and was associated with age, HLA-B27 positivity, and inflammation in the multivariate analysis. Data are scarce on the prevalence of renal involvement in SpA with evident heterogeneity, ranging from 0.1% to 11.3% of the cases2,3,4,5,6,7,8.
Our cohort comprises 360 patients with axial SpA with data collected prospectively since their enrollment in an observational study at …
Address correspondence to Dr. X. Juanola, Rheumatology Department, Hospital Universitari de Bellvitge, C/ Feixa Llarga, s/n. 08907, L’Hospitalet de Llobregat, Barcelona, Spain. E-mail: xjuanola{at}bellvitgehospital.cat