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In the study recently published in the Annals of Rheumatic Diseases, Dougados et al1 evaluated the prevalence of comorbidities and compared their management in rheumatoid arthritis (RA) patients from different countries. We know that RA is a chronic autoimmune disease characterised by chronic inflammation, progressive deterioration of joint function, increased comorbidity and mortality; RA patients have about a 50% increased risk of premature mortality.2 A comorbid condition may represent an active, past or transient illness and may be linked to RA process itself and/or its treatment or it may be completely independent of them3; the average RA patient has approximately 1.6 comorbidities.4 We conducted an observational, cross-sectional, non-comparative study to describe the presence of comorbidities in RA Mexican mestizo …
Contributors DV-M: designed data collection tools, monitored data collection for the whole study, wrote the statistical analysis plan, cleaned and analysed the data and drafted and revised the paper. MB-A: monitored data collection for the whole trial, analysed the data and drafted and revised the paper. AA-G: analysed the data and drafted and revised the paper.
Competing interests None.
Ethics approval Hospital General de Zona No. 17, Instituto Mexicano del Seguro Social with number: R-2013-1906-35.
Provenance and peer review Not commissioned; internally peer reviewed.