Σφακιανάκης Αλέξανδρος
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Σάββατο 8 Δεκεμβρίου 2018

Smoking, but not alcohol, is associated with risk of psoriasis in a Taiwanese population-based cohort study

Publication date: Available online 7 December 2018

Source: Journal of the American Academy of Dermatology

Author(s): Ying-Xiu Dai, Shih-Chun Wang, Yiing-Jenq Chou, Yun-Ting Chang, Tzeng-Ji Chen, Chung-Pin Li, Chen-Yi Wu

Background

Alcohol consumption and smoking have long been suspected of increasing the risk of developing psoriasis. Most evidence to date has derived from cross-sectional or case-control studies.

Objective

We sought to investigate the effects of alcohol and smoking on incident psoriasis.

Methods

Alcohol consumption, smoking status, and other covariates were collected from four rounds (2001, 2005, 2009, and 2013) of the Taiwan National Health Interview Survey. Incident psoriasis was identified from the National Health Insurance database. Cox regression model was used for the analysis.

Results

Of 60,136 subjects, 242 (0.40%) developed psoriasis. After controlling for demographics and comorbidities, alcohol consumption was not significantly associated with psoriasis risk. Conversely, psoriasis risk was higher for current smokers than never smokers (adjusted hazard ratio 1.47 [95% confidence interval 1.04-2.07]). The risks were higher among subjects who smoked >25 cigarettes per day and for >20 pack-years. In subgroup analysis, current smoking was significantly associated with risk of psoriasis without psoriatic arthritis but not psoriatic arthritis alone.

Limitations

Alcohol consumption was not assessed based on the number of drinks consumed.

Conclusion

Current smoking increased the risk of psoriasis, particularly augmented for individuals who smoked >25 cigarettes per day and for >20 pack-years, while alcohol consumption was not significantly associated with psoriasis development.



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