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JOURNAL ARTICLE
OBSERVATIONAL STUDY
The impact of smoking on disease activity, disability, and radiographic damage in rheumatoid arthritis: is cigarette protective?
Rheumatology International 2017 December
The ojective of this study is to assess the effect of tobacco smoking on disease activity, functional ability, and joint damage in a cohort of patients with early onset rheumatoid arthritis (EORA). 129 EORA patients attending the Rheumatology Unit of the School of Medicine of the "Universidad Nacional de Colombia" and the "Clínica de Artritis y Rehabilitación" in Bogota, Colombia, were enrolled in a prospective observational cohort study with 3-year follow-up. Clinical, biological, immunogenetics, and radiographic data were analyzed. Active disease was defined as DAS28 > 2.6. Smoking status was assessed by self-report as "never smokers" and "ever smokers". Patient groups with different smoking status were compared for RA measures. Status as "never smokers" and "ever smokers" was reported by 81.3 and 18.7%. Ever smokers had less risk of disability (HAQ-DI ≥ 0.5) at 36 month (Ever smokers vs. Never smokers OR for HAQ ≥ 0.5 0.25, 95% CI 0.06-0.97, p = 0.04). When former smokers were excluded in analysis, we found that current smoking was also associated with less disability and less risk of active disease. The percentage of erosive disease, radiographic progression, and SvdH score were similar in all smoking categories. In Colombian patients with EORA, smoking was associated with less disease activity and disability. Radiographic joint damage progressed at an equivalent rate in smokers and non-smokers. These data suggest a more benign, or at least not deleterious clinical course in smokers with RA.
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