1. Risk of non-melanoma skin cancer in a national cohort of veterans with rheumatoid arthritis.
- Author
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Amari, Wassila, Zeringue, Angelique L., McDonald, Jay R., Caplan, Liron, Eisen, Seth A., and Ranganathan, Prabha
- Subjects
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SKIN tumors , *AGE distribution , *ANALYSIS of variance , *ANTIRHEUMATIC agents , *BIOLOGICAL products , *COMPUTER software , *CONFIDENCE intervals , *DATABASES , *MEDICAL cooperation , *MULTIVARIATE analysis , *NONSTEROIDAL anti-inflammatory agents , *RESEARCH , *RHEUMATOID arthritis , *SEX distribution , *SURVIVAL analysis (Biometry) , *TUMOR necrosis factors , *LOGISTIC regression analysis , *DATA analysis , *PROPORTIONAL hazards models , *CHEMICAL inhibitors , *TUMOR risk factors - Abstract
Objective. To determine the incidence of and risk factors for non-melanoma skin cancer (NMSC) in a national cohort of veterans with RA.Methods. We examined skin cancer risk in a cohort of 20 648 patients with RA derived from the Department of Veterans’ Affairs (VA) national administrative databases. The cohort was divided into two medication groups: patients treated with non-biologic and TNF-α antagonist DMARDs. We defined skin cancer as the first occurrence of an International Classification of Disease, Version 9, Clinical Modification (ICD-9-CM) code for NMSC after initiation of a DMARD. Outcome risk was described using hazard ratios (HRs) with Cox proportional hazards regression for time-to-event analysis and logistic regression. We performed medical record review to validate the diagnosis of NMSC.Results. Incidence of NMSC was 18.9 and 12.7 per 1000 patient-years in patients on TNF-α antagonists and non-biologic DMARDs, respectively. Patients on TNF-α antagonists had a higher risk of developing NMSC (HR 1.42; 95% CI 1.24, 1.63). Risk factors for NMSC included older age, male gender, NSAID and glucocorticoid use and a history of prior malignancies. There was substantial agreement between ICD-9-CM diagnosis of NMSC and medical record validation (κ = 0.61).Conclusion. TNF-α antagonist therapy in veterans with RA may be associated with an increased risk of NMSC, compared with therapy with non-biologic DMARDs. Rheumatologists should carefully screen patients receiving TNF-α antagonists for pre-cancerous skin lesions and skin cancer. [ABSTRACT FROM PUBLISHER]
- Published
- 2011
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