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Severity of psoriasis differs between men and women: a registry based study of the clinical outcome measure Psoriasis Area and Severity Index (PASI) in 5438 patients
Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Dermatologi och venereologi. Centre for Pharmacoepidemiology (CPE), Karolinska Institutet, Karolinska University Hospital, T2, 171 76 Stockholm, Sweden.ORCID-id: 0000-0002-2610-5033
Centre for Pharmacoepidemiology (CPE), Karolinska Institutet, Karolinska University Hospital, Solna, Sweden.
Umeå universitet, Samhällsvetenskapliga fakulteten, Handelshögskolan vid Umeå universitet, Statistik.ORCID-id: 0000-0003-3298-1555
Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Dermatologi och venereologi.ORCID-id: 0000-0002-3858-8474
2017 (Engelska)Ingår i: American Journal of Clinical Dermatology, ISSN 1175-0561, E-ISSN 1179-1888, Vol. 18, s. 583-590Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Background: Psoriasis is a common skin disease and moderate to severe psoriasis is associated with a dose-dependent risk for metabolic and cardiovascular morbidity. It has previously been speculated that women have less severe psoriasis, as men are overrepresented in psoriasis registers and consume more care.

Objective: The objective of this study was to investigate, for the first time, the sex differences in the severity of psoriasis using the gold standard of severity measurement, the Psoriasis Area and Severity Index (PASI), and the distinct elements of the PASI score.

Design, Setting and Participants: This was a cross-sectional study based on the national registry for systemic treatment of psoriasis in Sweden (PsoReg), with 5438 patients experiencing moderate to severe psoriasis. Differences in the PASI score and its elements at enrolment were tested by multivariable ordinal logistic regressions.

Main Outcome Measures: The different components of the PASI score were used to analyze the assessment of disease severity. For each body area (head, arms, trunk, and legs), the score of the plaque characteristics and degree of skin involvement were used as outcomes.

Results: Women had statistically significantly lower median PASI scores (5.4) than men (7.3) [p < 0.001], which was consistent across all ages. The difference remained statistically significant in a multivariable linear regression. The itemized PASI analyses from the Mann–Whitney–Wilcoxon tests and the adjusted ordinal logistic regressions confirmed that women had significantly lower scores than men in all areas of the body, except for the head. No differences in the use of medications prior to enrolment could be found that may cause this difference between the sexes.

Conclusions: As the PsoReg contains the detailed disease measurement PASI, which was traditionally used for selected participants in clinical studies only, a nationwide unselected population could be investigated. The fact that women have less severe psoriasis can explain the dominance of males in the systemic treatment of psoriasis. These findings motivate a gender perspective in the management of psoriasis and in the prevention and management of its comorbidities.

Ort, förlag, år, upplaga, sidor
2017. Vol. 18, s. 583-590
Nationell ämneskategori
Dermatologi och venereologi
Forskningsämne
dermatologi och venereologi
Identifikatorer
URN: urn:nbn:se:umu:diva-113900DOI: 10.1007/s40257-017-0274-0ISI: 000405548600011OAI: oai:DiVA.org:umu-113900DiVA, id: diva2:890993
Tillgänglig från: 2016-01-05 Skapad: 2016-01-05 Senast uppdaterad: 2018-06-07Bibliografiskt granskad
Ingår i avhandling
1. Psoriasis in Sweden: observational studies from an epidemiological perspective
Öppna denna publikation i ny flik eller fönster >>Psoriasis in Sweden: observational studies from an epidemiological perspective
2016 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Alternativ titel[sv]
Psoriasis i Sverige : observationella studier ur ett epidemiologiskt perspektiv
Abstract [en]

Background: Psoriasis is a heterogeneous disease with several clinical manifestations; the symptoms are characterized by redness, scaliness and thickness of the skin. There are several treatment options available for psoriasis and patients with moderate to severe psoriasis generally need systemic agents. In 2004 biologics were introduced for patients with moderate to severe psoriasis in Sweden.

Methods: The Swedish Health Care Registers and the Swedish registry for systemic treatment of psoriasis PsoReg, were used to; estimate the incidence of psoriasis cases in the Swedish specialist care, to examine the treatment allocation and important factors related to the initiation of especially biologic treatment.

Results: On average 9000 new psoriasis patients entered specialist care in Sweden each year under study, corresponding to an incidence of 98 patients per 100,000 person-years. In the treatment allocation analysis of the incident psoriasis cases in the Swedish specialist care Patients living in a Metropolitan Area and with a University degree were more likely to initiate a biologic treatment. By analysing biologic-naïve patients enrolled in PsoReg, PASI (the physician’s assessment of the psoriasis severity) and Psoriasis Arthropathy were shown to be two important factors associated with the initiation of biologic treatment while sex was not. Furthermore, it was also shown that the decision to initiate biological treatment was more strongly associated with PASI than with DLQI (the patients’ assessment of the disease impact Quality of Life).

Conclusion: These studies indicate that there are inequalities in the assignments of systemic psoriasis treatments (especially in biologic treatment). Since the allocation of treatments should not depend on sex, education or residency in a Metropolitan Area but rather the need of care, it is important that future studies continue analysing possible factors that could influence the initiation of treatment in clinical practice.

Ort, förlag, år, upplaga, sidor
Umeå: Umeå Universitet, 2016. s. 48
Serie
Umeå University medical dissertations, ISSN 0346-6612 ; 1776
Nyckelord
Psoriasis, Systemic treatments, Biologic treatments, PASI, DLQI, Register-based research
Nationell ämneskategori
Dermatologi och venereologi
Forskningsämne
dermatologi och venereologi
Identifikatorer
urn:nbn:se:umu:diva-113894 (URN)978-91-7601-402-8 (ISBN)
Disputation
2016-01-22, Sal E04, byggnad 6E, Norrlands Universitetsjukhus, Umeå, 09:00 (Svenska)
Opponent
Handledare
Tillgänglig från: 2016-01-08 Skapad: 2016-01-05 Senast uppdaterad: 2018-06-07Bibliografiskt granskad

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