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How is disease severity associated with quality of life in psoriasis patients?: Evidence from a longitudinal population-based study in Sweden
Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Dermatologi och venereologi. PAREXEL Int, Stockholm, Sweden.
Linköping Univ, Dept Med & Hlth Sci, Linköping, Sweden.
Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Dermatologi och venereologi.ORCID-id: 0000-0002-3858-8474
2017 (Engelska)Ingår i: Health and Quality of Life Outcomes, ISSN 1477-7525, E-ISSN 1477-7525, Vol. 15, nr 1, artikel-id 151Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

BACKGROUND: Assessing the impact of disease severity on generic quality of life (QOL) is a critical step in outcomes research and in the development of decision-analytic models structured around health states defined by clinical measures. While data from routine clinical practice found in healthcare registers are increasingly used for research, more attention should be paid to understanding the relationship between clinical measures of disease severity and QOL. The purpose of this work was therefore to investigate this relationship in psoriasis using a population-based dataset.

METHODS: Severity was measured by the Psoriasis Area and Severity Index (PASI), which combines severity of erythema, induration, and desquamation into a single value ranging from 0 to 72. The generic EQ-5D-3L utility instrument, under the UK tariff, was used to measure QOL. The association between PASI and EQ-5D-3L was estimated using a population-based dataset of 2674 patients with moderate to severe psoriasis enrolled over ten years in the Swedish psoriasis register (PsoReg). Given the repeated measurement of patients in the register data, a longitudinal fixed-effects model was employed to control for unobserved patient-level heterogeneity.

RESULTS: Marginal changes in PASI are associated with a non-linear response in EQ-5D-3L: Moving from PASI 10 to 9 (1 to 0) is associated with an increase of 0.0135 (0.0174) in EQ-5D-3L. Furthermore, unobserved patient-level heterogeneity appears to be an important source of confounding when estimating the relationship between QOL and PASI.

CONCLUSIONS: Using register data to estimate the impact of disease severity on QOL while controlling for unobserved patient-level heterogeneity shows that PASI appears to have a larger impact on QOL than previously estimated. Routine collection of generic QOL data in registers should be encouraged to enable similar applications in other disease areas.

Ort, förlag, år, upplaga, sidor
2017. Vol. 15, nr 1, artikel-id 151
Nyckelord [en]
Quality of life, EQ-5D; Disease severity, Population-based data, Register data, Psoriasis
Nationell ämneskategori
Hälso- och sjukvårdsorganisation, hälsopolitik och hälsoekonomi
Forskningsämne
dermatologi och venereologi
Identifikatorer
URN: urn:nbn:se:umu:diva-138071DOI: 10.1186/s12955-017-0721-xISI: 000406615700001PubMedID: 28754116OAI: oai:DiVA.org:umu-138071DiVA, id: diva2:1129683
Tillgänglig från: 2017-08-06 Skapad: 2017-08-06 Senast uppdaterad: 2018-06-09Bibliografiskt granskad

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