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Epidemiological Study of Psoriasis in the National Health Insurance Database in Taiwan
The aim of this study was to determine the prevalence, treatment modalities and comorbidity of psoriasis in Taiwan. A nationally representative cohort of 1,000,000 individuals from the National Health Insurance database was followed up for the years 2000 to 2006. Their claims data was used for an epidemiological study. The mean one-year prevalence of psoriasis was 0.23% for men and 0.16% for women, respectively. The prevalence of psoriasis increased more rapidly in male patients aged 30 years and over and reached its peak in patients aged 70 years and over, regardless of sex. Overall, 98.4% of patients received treatment with topical corticosteroids, while 13.1% used Chinese herbal medicines and 13.6% received systemic treatment. Patients with psoriasis had a higher comorbidity of diabetes, hyperlipidaemia, and hypertension. In conclusion, in contrast to Caucasians, the prevalence of psoriasis in Taiwanese people is high er in men than in women and the prevalence increases significantly in patients over 70 years of age.
Yun-Ting Chang, Tzeng-Ji Chen, Pei-Chi Liu, Yu-Chun Chen, Yi-Ju Chen, Yu-Lin Huang, Jaw-Shyang Jih, Chih-Chiang Chen, Ding-Dar Lee, Wen-Jen Wang, Ming-Wei Lin and Han-Nan Liu1
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Gelfand JM, Weinstein R, Porter SB, Neimann AL, Berlin JA, Margolis DJ. Prevalence and treatment of psoriasis in the United Kingdom: a population-based study. Arch Dermatol 2005; 141: 1537–1541.
Ferrándiz C, Bordas X, García-Patos V, Puig S, Pujol R, Smandía A. Prevalence of psoriasis in Spain (Epiderma Project: phase I). J Eur Acad Dermatol Venereol 2001; 15: 20–23.
Yip SY. The prevalence of psoriasis in the Mongoloid race. J Am Acad Dermatol 1984; 10: 965–968.
Chang YT, Chou CT, Yu CW, Lin MW, Shiao YM, Chen CC, et al. Cytokine gene polymorphisms in Chinese patients with psoriasis. Br J Dermatol 2007; 156: 899–905.
Chang YC, Wu WM, Chen CH, Lee SH, Hong HS, Hsu LA. Association between the insertion/deletion polymorphism of the angiotensin I-converting enzyme gene and risk for psoriasis in a Chinese population in Taiwan. Br J Dermatol 2007; 156: 642–645.
Chen HH, Tseng MP, Tsai TF. An epidemiologic study of Taiwanese psoriatic patients in a single clinic. Dermatolo Sinica 2003; 21: 216–224.
Sterry W, Strober BE, Menter A. Obesity in psoriasis: the metabolic, clinical and therapeutic implications. Report of an interdisciplinary conference and review. Br J Dermatol 2007; 157: 649–655.
Neimann AL, Shin DB, Wang X, Margolis DJ, Troxel AB, Gelfand JM. Prevalence of cardiovascular risk factors in patients with psoriasis. J Am Acad Dermatol 2006; 55: 829–835.
Kimball AB, Robinson D Jr, Wu Y, Guzzo C, Yeilding N, Paramore C, et al. Cardiovascular disease and risk factors among psoriasis patients in two US healthcare databases, 2001–2002. Dermatology 2008; 217: 27–37.
Gelfand JM, Neimann AL, Shin DB, Wang X, Margolis DJ, Troxel AB. Risk of myocardial infarction in patients with psoriasis. JAMA 2006; 296: 1735–1741.
Cheng SH, Chiang TL. The effect of universal health insurance on health care utilization in Taiwan: results from a natural experiment. JAMA 1997; 278: 89–93.
Chen FP, Chen TJ, Kung YY, Chen YC, Chou LF, Chen FJ, et al. Use frequency of traditional Chinese medicine in Taiwan. BMC Health Serv Res 2007; 7: 26.
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Kung YY, Chen YC, Hwang SJ, Chen TJ, Chen FP. The prescriptions frequencies and patterns of Chinese herbal medicine for allergic rhinitis in Taiwan. Allergy 2006; 61: 1316–1318.
Kuo HW, Tsai SS, Tiao MM, Yang CY. Epidemiological features of CKD in Taiwan. Am J Kidney Dis 2007; 49: 46–55.
Wang YC, Lin JM, Li CY, Lee LT, Guo YL, Sung FC. Prevalence and risks of chronic airway obstruction: a population cohort study in Taiwan. Chest 2007; 131: 705–710.
Chang YT, Tsai SF, Lee DD, Shiao YM, Huang CY, Liu HN, et al. A study of candidate genes for psoriasis near HLA-C in Chinese patients with psoriasis. Br J Dermatol 2003; 148: 418–423.
Lin TF. Modifiable health risk factors and medical expenditures – the case of Taiwan. Soc Sci Med. 2008; 67: 1727–1736.
Herron MD, Hinckley M, Hoffman MS, Papenfuss J, Hansen CB, Callis KP, et al. Impact of obesity and smoking on psoriasis presentation and management. Arch Dermatol 2005; 141: 1527–1534.
Naldi L, Chatenoud L, Linder D, Belloni Fortina A, Peserico A, Virgili AR, et al. Cigarette smoking, body mass index, and stressful life events as risk factors for psoriasis: results from an Italian case-control study. J Invest Dermatol 2005; 125: 61–67.
Huerta C, Rivero E, Rodríguez LA. Incidence and risk factors for psoriasis in the general population. Arch Dermatol 2007; 143: 1559–1565.
Chen YJ, Wu CY, Shen JL, Chu SY, Chen CK, Chen CM, et al. Psoriasis independently associated with hyperleptinemia contributing to metabolic syndrome. Arch Dermatol 2008; 144: 1571–1575.
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Volume 89, Issue 3
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