How was Mediterranean diet associated with severity of psoriasis?
Bottom Line: Adherence to a Mediterranean diet, an eating plan filled with fruits and vegetables, legumes, cereals, bread, fish, fruit, nuts and extra-virgin olive oil, may be associated with the severity of the skin condition psoriasis.
Why The Research Is Interesting: Psoriasis is a common chronic inflammatory skin condition. Studies have suggested adherence to a healthy diet, such as the Mediterranean diet, may reduce the risk of long-term systemic inflammation. This study assessed the association between a score that reflected adherence to the Mediterranean diet and the onset or severity of psoriasis.
Who and When: 35,735 respondents who are part of an ongoing, observational web-based questionnaire study launched in 2009, of whom 3,557 reported they had psoriasis; the condition was severe in 878 cases and 299 news cases were recorded as those arising more than two years after inclusion in the study group
What (Study Measures): Patients with psoriasis were identified via online self-completed questionnaire and categorized by disease severity; data on dietary intake were gathered during the first two years of participation in the study group to calculate a score reflecting adherence to a Mediterranean diet from 0 for no adherence to 18 for maximum adherence.
How (Study Design): This was an observational study. Because researchers were not intervening for purposes of the study they cannot control natural differences that could explain the study findings.
Authors: Céline Phan, M.D., of Hôpital Mondor, Créteil, France, and coauthors
Results: There was an "inverse" association between adherence to a Mediterranean diet and the severity of psoriasis, which suggests patients with severe psoriasis adhered less strongly to the Mediterranean diet, even after accounting for other potential mitigating factors.
Study Limitations: Study participants were all volunteers and they may be more concerned about their health than the general population, data were self-reported and some data were missing.
To Learn More: The full study is available on the For The Media website.
For more details and to read the full study, please visit the For The Media website.
Editor's Note: The study includes a funding/support disclosure. Please see the article for additional information, including other authors, author contributions and affiliations, financial disclosures, funding and support, etc.
To place an electronic embedded link in your story: Link will be live at the embargo time http://jamanetwork.com/journals/jamadermatology/fullarticle/10.1001/jamadermatol.2018.2127