...are at greater risk of depression. This is according to new research recently presented at the American Academy of Dermatology's 2015 Summer Annual Meeting in New York, NY.
Researchers found people with psoriasis were twice as likely to meet the criteria for major depression than those without the skin disease.
It is estimated that around 7.5 million people in the US have psoriasis. While it can occur in people of all ages, it most commonly develops between the ages of 15 and 25.
The exact cause of psoriasis is unclear, but researchers believe it may be triggered by the immune system attacking healthy cells - particularly skin cells, causing what is known as plaque psoriasis.
Symptoms of plaque psoriasis include itchy, sore and flakey skin, which most commonly occurs on the elbows, knees, scalp, back, face, palms and feet.
Dr. Roger S. Ho, assistant professor of dermatology at the NYU School of Medicine at the NYU Langone Medical Center in New York, NY, says he has seen first-hand how patients with psoriasis can become depressed. As such, he and his colleagues decided to investigate the association further.
People with psoriasis at twice the risk of depression
The researchers analyzed data from the National Health and Nutrition Examination Survey (NHANES), involving 12,382 adults - some of whom had plaque psoriasis.
- Psoriasis is the most prevalent autoimmune disease in the US
- Around 10-30% of people with psoriasis go on to develop psoriatic arthritis -inflammation of the joints
- Around 60% of people with psoriasis say the condition largely impacts their day-to-day lives.
The researchers say their results remained even after accounting for other risk factors fordepression, including age, race, gender, body mass index (BMI), physical activity, alcohol and tobacco use and history of other medical conditions.
The researchers say they are unable to pinpoint exactly why individuals with psoriasis are at greater risk of depression, but Dr. Ho hypothesizes that it may be down to stigma associated with the skin disease.
He explains that because psoriasis is highly visible on a patient's skin, people who see it may "react unfavorably" toward that individual, though he says this is completely unnecessary.
"The public should know that psoriasis is not contagious," he adds, "so there is no need to act differently around psoriasis patients than you would around anyone else."
Based on their findings, the researchers say patients with psoriasis should consult a doctor if they begin to experience any depressive symptoms.
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