Correlation between Dermatology Life Quality Index and Psoriasis Area and Severity Index in Patients with Psoriasis: A Cross-sectional Global Healthcare Study on Psoriasis

Authors

  • Julia-Tatjana Maul Faculty of Medicine, University of Zurich, Zurich, Switzerland; Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
  • Lara V. Maul Faculty of Medicine, University of Zurich, Zurich, Switzerland; Department of Dermatology, University Hospital Zurich, Zurich, Switzerland; Department of Dermatology, University Hospital Basel, Basel, Switzerland
  • Johannes A. Didaskalu Faculty of Medicine, University of Zurich, Zurich, Switzerland
  • Fernando Valenzuela Department of Dermatology, University of Chile, Santiago, Chile
  • Ricardo Romiti Department of Dermatology, University of São Paulo, School of Medicine, São Paulo, Brazil
  • Hannah Peterson Loma Linda University School of Medicine, Loma Linda, California, USA
  • Edwin Korouri Rosalind Franklin University of Medicine and Science, Chicago Medical School, North Chicago, Illinois, USA
  • Farah Novoa Department of Dermatology, Jockey Salud Medical Center, Lima, Peru
  • Hazel H. Oon Department of Dermatology, National Skin Centre, Singapore
  • Min Zheng 10) Dermatology Department, Second Affiliated Hospital, Zhejiang University, School of Medicine, Zhejiang, China
  • Jashin J. Wu Department of Dermatology, University of Miami Miller School of Medicine, Miami, USA
  • Jacob P. Thyssen Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
  • Alexander Egeberg Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark; Department of Dermatology, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark
  • April W. Armstrong Keck School of Medicine, University of Southern California, Los Angeles, California, USA
  • Mia-Louise Nielsen Department of Dermatology, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark

DOI:

https://doi.org/10.2340/actadv.v104.20329

Keywords:

correlation, cross-sectional study, DLQI, GHSP, PASI, psoriasis

Abstract

Quality of life impairment in dermatology patients and severity of psoriasis are quantified by the Dermatology Life Quality Index (DLQI) and the Psoriasis Area and Severity Index (PASI), respectively. The aim of this study is to compare the correlation between PASI and DLQI in patients from different geographical areas and to identify predictors of high DLQI across geographical regions. Correlations between PASI and DLQI were evaluated using Spearman’s rank correlation tests and quantile regression. The study included 1,158 patients with psoriasis, with a median (interquartile range) PASI and DLQI of 6.0 (3.0–12.0) and 8.0 (4.0–15.0), respectively. Correlations were demonstrated between PASI and DLQI, both overall and stratified by geographical region. Quantile (median) regression yielded coefficients of 0.75 (95% confidence interval (95% CI) 0.62, 0.88) for Switzerland, 0.50 (95% CI 0.42, 0.58) for Latin America, 0.34 (95% CI 0.16, 0.51) for Asia, and 0.31 (95% CI 0.08, 0.53) for the USA. Current age, age at diagnosis, sex, body mass index, and psoriasis arthritis affected DLQI in Latin America, while education had an impact among patients treated in Switzerland. Few countries were included within each continent; hence, more data from different countries are necessary for generalizability. The study showed correlations between PASI and DLQI among patients in all included geographical regions. The patients’ characteristics affecting DLQI vary worldwide.

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Published

2024-03-12 — Updated on 2026-08-21

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How to Cite

Maul, J.-T., Maul, L. V., Didaskalu, J. A., Valenzuela, F., Romiti, R., Peterson, H., … Nielsen, M.-L. (2026). Correlation between Dermatology Life Quality Index and Psoriasis Area and Severity Index in Patients with Psoriasis: A Cross-sectional Global Healthcare Study on Psoriasis. Acta Dermato-Venereologica, 104, adv20329. https://doi.org/10.2340/actadv.v104.20329 (Original work published March 12, 2024)

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Copyright (c) 2024 Julia-Tatjana Maul, Lara W. Maul, Johannes A. Didaskalu, Fernando Valenzuela, Ricardo Romiti, Hannah Peterson, Edwin Korouri, Farah Novoa, Hazel H. Oon, Min Zheng, Jashin J. Wu, Jacob P. Thyssen, Alexander Egeberg, April W. Armstrong, Mia-Louise Nielsen

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