Methotrexate was the conventional oral therapy used most often (68% of the time), followed by cyclosporine and acitretin (in 14% and 12% of patients, respectively), and etanercept was the biologic therapy used most often (56%) followed by adalimumab (used by 48%).
The most common reasons for discontinuing treatment were concerns about safety, issues with tolerability, and lack or loss of effectiveness. The greatest contributors to treatment burden among those using conventional oral therapies were side effects and the need for laboratory monitoring, and the greatest contributors among those using biologics were concerns about long-term safety, anxiety or fear, pain, and inconvenience associated with self injection.
More than half of all respondents with psoriatic arthritis (51%) agreed that using currently available therapies can be worse than the condition itself, and 88% said better therapies are needed.
These results underscore the need for improved screening, as many patients with joint symptoms had not been diagnosed with psoriatic arthritis. They also demonstrate a need for improved assessment of disease severity; pruritus – which was reported as the most bothersome symptom – “is not included in most assessment tools,” the investigators noted.
Further, the results highlight the need for a higher level of treatment in many patients, they said, explaining that survey responses indicated substantial undertreatment in numerous cases. Many patients were receiving no treatment or only topical treatment, and many who were experiencing symptoms were not currently seeking care from a health care provider.
The MAPP survey is the first large-scale, multinational, population-based survey of psoriasis and psoriatic arthritis patients. The survey included 3,426 patients and 781 physicians in North America and Europe. The U.S. findings, which indicate little systematic implementation of treatment algorithms as well as widespread undertreatment, are particularly important given that psoriasis affects 3.2% of adults in the United States, and that 30% of those patients have psoriatic arthritis, the researchers noted.
Most of these patients report that their condition affects their emotional well-being, their quality of life, and their daily activities, they noted.
“These findings deserve attention and action to improve the care and lives of patients with psoriasis and psoriatic arthritis,” they concluded.
The survey was sponsored by Celgene, which markets apremilast (Otezla). Dr. Lebwohl disclosed ties to numerous pharmaceutical companies, including several that market drugs for psoriasis and psoriatic arthritis.