Diet-induced inflammation seems not to be associated with psoriasis, according to a study published online Jan. 26 in the Journal of Dermatology.

Nouzhou Liu, from Sichuan University in Chengdu, China, and colleagues examined the association between the dietary inflammatory index (DII) and incident psoriasis in a cross-sectional study based on the 2003 to 2006 and 2009 to 2014 National Health and Nutrition Examination Surveys. DII was calculated based on 24-hour dietary recall.

A total of 13,284 participants (average age, 48.94 ± 17.71 years) were enrolled. The researchers found that the prevalence of psoriasis was 2.88 percent. In a multivariable logistic regression model, there was no association seen for incident psoriasis with DII (odds ratio, 1.00; 95 percent confidence interval, 0.89 to 1.11). The odds ratio for those in the highest versus the lowest DII tertile was 0.81 (95 percent confidence interval, 0.51 to 1.28; P trend, 0.0974). In participants with different population settings, DII was still not associated with psoriasis. Restricted cubic splines showed no association for DII with psoriasis in an overall or nonlinear manner.

"Although a proinflammatory diet could lead to several health risks, the occurrence of psoriasis might not be associated with dietary inflammatory potential," the authors write.

Abstract/Full Text