| Cancer Risk Among Patients With Systemic Sclerosis: A Nationwide Population Study In Taiwan |
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| Thursday, 15 December 2011 13:52 |
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C-F Kuo, S-F Luo, K-H Yu, I-J Chou, W-Y Tseng, H-C Chang, Y-F Fang, M-J Chiou, L-C See Posted online on December 11, 2011 Objectives: Systemic sclerosis (SSc) has been associated with high cancer risk. We compared the cancer risk among SSc patients with that among the general Taiwanese population. Methods: The catastrophic illness registry of the Taiwan National Health Insurance Research Dataset (NHIRD) was used to identify patients diagnosed with SSc and cancer in Taiwan during 1996–2008. The standardized incidence ratio (SIR) for cancer was calculated, and mortality was ascertained using the data from the National Death Registry.
Results: Data analysis revealed that 2053 (472 men, 1581 women) Taiwanese individuals were diagnosed with SSc during the study period and 83 (30 men, 53 women) had cancer. The incidence of cancer was 6.9/1000 person-years. The most common cancer sites in male SSc patients were the lung (n = 10), oral cavity and pharynx (n = 8), and gastrointestinal tract (n = 4), and those in female patients were the breast (n = 11), lungs (n = 11), and blood (n = 6). Compared to the Taiwanese population of 1996, the all-cancer SIR for SSc was 1.63 [95% confidence interval (CI) 1.31–2.01]. Cancer risk was elevated for cancers of the lung (SIR 4.20), oral cavity and pharynx (SIR 3.67), and blood (SIR 3.50). A cancer diagnosis in SSc patients was associated with a hazard ratio (HR) of 2.15 (95% CI 1.30–3.53). Among cancer patients, a diagnosis of SSc was not associated with increased mortality. Conclusions: SSc patients are at high risk of developing cancer, especially of the lung, oral cavity and pharynx, and blood. For more information visit the Scandinavian Journal of Rheumatology |
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