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Related Experiment Video

Updated: Jul 17, 2025

An Immunohistopathologic Study to Profile the Folate Receptor Beta Macrophage and Vascular Immune Microenvironment in Giant Cell Arteritis
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Can active sun exposure decrease the risk of giant cell arteritis and polymyalgia rheumatica in women?

Karl Gisslander1, Raïssa de Boer1, Christian Ingvar2

  • 1Rheumatology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden.

Rheumatology Advances in Practice
|September 7, 2023
PubMed
Summary
This summary is machine-generated.

Active sun exposure did not influence the risk of developing giant cell arteritis (GCA) or polymyalgia rheumatica (PMR) in women. This prospective study found no significant link between sun habits and these inflammatory conditions.

Keywords:
GCAPMRenvironmental risk factorsun exposure

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Area of Science:

  • Rheumatology
  • Epidemiology
  • Dermatology

Background:

  • Giant cell arteritis (GCA) and polymyalgia rheumatica (PMR) are inflammatory conditions with potential environmental triggers.
  • Vitamin D, influenced by sun exposure, plays a role in immune function, prompting investigation into its effect on GCA and PMR risk.

Purpose of the Study:

  • To investigate the association between active sun exposure and the incidence of GCA and PMR in a prospective cohort of women.
  • To determine if higher levels of sun exposure reduce the risk of developing these autoimmune diseases.

Main Methods:

  • A prospective cohort study utilizing data from the Melanoma Inquiry in Southern Sweden (MISS).
  • Linking self-reported sun exposure data with healthcare records from the Skåne Healthcare Register (SHR).
  • Cox proportional hazards models were employed to assess the risk, adjusting for relevant covariates.

Main Results:

  • No significant difference in GCA or PMR risk was observed between women with moderate/high sun exposure and those who avoided sun.
  • Hazard ratios for GCA/PMR were 1.2 (CI 0.9, 1.6) and 1.3 (0.9, 1.9) for moderate and high sun exposure, respectively.
  • Similar non-significant trends were noted when analyzing GCA and PMR individually.

Conclusions:

  • Active sun exposure does not appear to modify the risk of developing GCA or PMR in women within this cohort.
  • The findings suggest that sun exposure is unlikely to be a significant protective factor against these conditions in this population.