Mechanisms driving sex differences remain unclear
“In the past few decades, there has been increasing interest in the effect of sex on the manifestations and impact of PsA as well as on the response to therapy,” Dafna D. Gladman, MD, of the University of Toronto and the Krembil Research Institute at Toronto Western Hospital, wrote in an accompanying editorial.
Dr. Dafna D. Gladman
The current study findings support previous research showing differences in disease expression in PsA between men and women, Dr. Gladman said. Several studies have shown more axial disease and joint damage in men than in women, while women reported greater functional disability and worse quality of life than men. The reasons for gender differences remain unclear, and genetics may play a role as well, she said.
Dr. Gladman emphasized the need for more research on the impact of fibromyalgia (FM) in particular. “As was shown in a previous study, the presence of FM affects the clinical assessment of patients with PsA,” she wrote. Fibromyalgia and pain reporting also may affect clinical trials of patients with PsA; however, the effect of fibromyalgia on sex differences is uncertain, she said. “In a disease that affects men and women equally, recognizing sex effect is important,” and more research is needed to explore the mechanisms behind this effect, she concluded.
The study was supported by Janssen Research & Development. Dr. Gossec disclosed receiving research grants and/or consulting fees from Janssen and 13 other pharmaceutical companies. Several study coauthors disclosed relationships with multiple companies, and several coauthors are employees and stockholders of Janssen. Dr. Gladman had no financial conflicts to disclose.