Coffee, caffeine not linked to psoriasis in U.S. women

March 21, 2012
Coffee, caffeine not linked to psoriasis in U.S. women

(HealthDay) -- Coffee and caffeine are not associated with psoriasis incidence after adjustment for smoking, according to a research letter published in the March issue of the Archives of Dermatology.

Wenqing Li, Ph.D., from the Brigham and Women's Hospital and Harvard Medical School in Boston, and colleagues investigated the long-term association between coffee and caffeine intake and psoriasis in 82,539 U.S. women, free from psoriasis in 1991, using data from the Nurses' Health Study II. Participants completed questionnaires in 2005 to identify the incidence of psoriasis and were asked about food and in 1991, 1995, 1999, and 2003.

During 1,140,758 person-years of follow-up, the researchers identified 986 incident cases of psoriasis. In an age-adjusted model, the risk of psoriasis was moderately increased with increasing . The association was no longer significant after adjustment for smoking. The association between decaffeinated coffee and the risk of psoriasis was not significant. There was a trend toward increased risk of psoriasis with increased caffeine intake in an age-adjusted model; however, the association was no longer significant following adjustment for smoking.

"We did not observe a material change of psoriasis incidence associated with coffee or caffeine intake, after adjusting for known confounders," the authors write. "Smoking appears to be the major confounder underlying the observed significant association between coffee and caffeine intake and risk of psoriasis in age-adjusted models."

One of the authors disclosed to the pharmaceutical industry, including receipt of grants from Amgen/Pfizer for assessment of biomarkers in psoriasis and .

Explore further: Smoking is an independent risk factor for psoriasis

More information: Abstract
Full Text (subscription or payment may be required)

Related Stories

Smoking is an independent risk factor for psoriasis

March 7, 2012

(HealthDay) -- Smoking is an independent risk factor for psoriasis, with particularly strong associations for heavy smokers and those who have smoked for many years, according to research published in the March 1 issue of ...

Recommended for you

Monkeys in Asia harbor virus from humans, other species

November 19, 2015

When it comes to spreading viruses, bats are thought to be among the worst. Now a new study of nearly 900 nonhuman primates in Bangladesh and Cambodia shows that macaques harbor more diverse astroviruses, which can cause ...

One-step test for hepatitis C virus infection developed

November 14, 2015

UC Irvine Health researchers have developed a cost-effective one-step test that screens, detects and confirms hepatitis C virus (HCV) infections. Dr. Ke-Qin Hu, director of hepatology services, will present findings at the ...

Computer model reveals deadly route of Ebola outbreak

November 10, 2015

Using a novel statistical model, a research team led by Columbia University's Mailman School of Public Health mapped the spread of the 2014-2015 Ebola outbreak in Sierra Leone, providing the most detailed picture to date ...

1 comment

Adjust slider to filter visible comments by rank

Display comments: newest first

not rated yet Mar 22, 2012
very cool read, interesting about the coffee and psoriasis although for me psoriasis isn't something I worry about anymore and I can honestly say I beat the disease it's strange reading this though brings back memories (bad ones) I know the struggle of such a disease but thanks to this natural free treatment it's all good, and i'm glad cause my disease was becoming a life threatening issue, you can read all about my life with psoriasis and the "magical treatment" here:

catch ya later - Jake

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.