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Women Have a Statistically Significant Lower Incidence of Severe Psoriasis Compared to Men

Women Have a Statistically Significant Lower Incidence of Severe Psoriasis Compared to Men
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Umea University


Umea University (click to view)

Umea University

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Special issue of the Journal of General Internal Medicine reviews the current landscape of primary care innovation.

The fact that men are overrepresented in psoriasis registers and consume more psoriasis care have long led researchers to believe that the common skin disease disproportionally affects men. A unique study with 5,438 Swedish psoriasis patients now reveals that women have a statistically significant lower incidence of severe psoriasis compared to men. The study, conducted by researchers at Umeå University and Karolinska Institutet, is published in the American Journal of Clinical Dermatology.

“Our results tell us that the well-established gender differences in the utilization of psoriasis care can at least partially be explained by a higher prevalence of more severe disease in men,” says Marcus Schmitt-Egenolf, who is researcher at the Department of Public Health and Clinical Medicine at Umeå University and senior author of the study.


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The study of gender differences in severe psoriasis cases was based on the Swedish quality register for systemic treatment of psoriasis, PsoReg, which contains detailed disease measurement data on all patients measured with the standard method Psoriasis Area Severity Index (PASI). In the analysis, the researchers found that women had significantly (p<0.001) lower median PASI values than men (5.4 for women versus 7.3 for men). The findings of more severe psoriasis in men were consistent across all ages and in all areas of the body except for the head.

The researchers point out that the study found no differences between women and men in the use of medications before enrolment in the PsoReg register that may explain the observed sex difference. Instead, the researchers argue, the finding that women have less severe psoriasis can explain the well-known male dominance in systemic treatment of psoriasis.

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