Combined effects of HLA-Cw6, body mass index and waist-hip ratio on psoriasis vulgaris in Chinese Han population.

Abstract

BACKGROUND:

Psoriasis is a chronic inflammatory skin disease associated with an HLA-Cw6 allele. Higher waist-hip ratio (WHR) and body mass index (BMI) may increase the risk of psoriasis vulgaris, but, to our knowledge, no evidence of the combined effects of HLA-Cw6 and BMI, WHR are available.

OBJECTIVES:

To evaluate the combined effect of HLA-Cw6, BMI and WHR on psoriasis vaulgaris.

METHODS:

The data of 466 patients and 177 controls were investigated and analyzed by a hospital-based case-control study and non-condition logistic regress model.

RESULTS:

There was a graded positive association of WHR and BMI with psoriasis vulgaris. Compared with a WHR of 0.80 or less than 0.80, the odds ratio (OR) was 2.36 (p < 0.01) for WHR 0.80-0.85, and 2.74 (p < 0.01) for WHR greater than 0.85. Compared with subjects with a BMI of 20 or less than 20, the multivariate OR of psoriasis were 1.20 (p > 0.05) for a BMI of 20-25, 1.84 (p < 0.05) for a BMI of more than 25 corresponding overweight (p for trend, <0.01). We found not only the risk of psoriasis for the individual with HLA-Cw6+ was 8.33 times greater than that for individual with HLA-Cw6(-) but also the risk increased approximately 35 times in individuals with HLA-Cw6+ and a overweight as compared with one with HLA-Cw6(-) and a non-overweight, and 17-fold when the individuals with HLA-Cw6+ and a WHR of more than 0.80 were compared with individuals with HLA-Cw6(-) and a WHR of 0.80 or less than 0.80, displaying the combined effect of HLA-Cw6, BMI and WHR (all p < 001).

CONCLUSION:

This study suggested that HLA-Cw6, overweight and higher waist-hip ratio are material risk factors of psoriasis vulgaris, specially the combined effects of HLA-Cw6 and BMI, WHR on psoriasis vulgaris in Chinese population.

• Authors: Yongtang Jin, Fengyu Zhang, Sen Yang, Yunming Kong, Fengli Xiao, Yong Hou, Xing Fan, Xuejun Zhang
• Journal: Journal of dermatological science (J Dermatol Sci) Vol. 52 Issue 2 Pg. 123-9 (Nov 2008) ISSN: 0923-1811 [Print] Netherlands
• PMID: 18585007 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• HLA-C Antigens
• HLA-C*06 antigen

Topics

• Adolescent
• Adult
• Aged
• Alleles
• Asian People (ethnology, genetics)
• Body Mass Index
• Case-Control Studies
• Child
• Child, Preschool
• China
• Female
• Genetic Predisposition to Disease (ethnology, genetics)
• HLA-C Antigens (genetics)
• Humans
• Infant
• Logistic Models
• Male
• Middle Aged
• Obesity (complications, ethnology)
• Psoriasis (epidemiology, ethnology, genetics)
• Risk Factors
• Waist-Hip Ratio (statistics & numerical data)