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Defining a long COVID 'expotype' within the P4O2 COVID-19 study.

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Summary

Environmental factors, or exposome, may influence long COVID severity, particularly fatigue and quality of life. Urban planning and prevention strategies could consider these exposures to improve patient outcomes.

Keywords:
External exposomeLong COVID

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Area of Science:

  • Environmental Health
  • Public Health
  • Long COVID Research

Background:

  • Long COVID affects at least 10% of COVID-19 survivors, with fatigue as a primary symptom.
  • The exposome's role in long COVID severity is understudied, despite its link to acute COVID-19.
  • This study investigates environmental factor phenotypes (expotypes) associated with long COVID severity.

Purpose of the Study:

  • To identify potential exposome phenotypes linked to long COVID severity.
  • To explore associations between environmental factors and fatigue, quality of life, and fatigue progression in long COVID patients.

Main Methods:

  • Recruited 95 long COVID patients in the Netherlands, assessing symptoms 3-6 months post-infection.
  • Evaluated fatigue (using FSS), Quality of Life (QoL), and fatigue over time as severity indicators.
  • Included 4 air pollutants and 7 neighborhood characteristics, adjusting for demographic factors in frequentist and Bayesian analyses.

Main Results:

  • Population density and light at night were associated with fatigue.
  • Increased distance to blue space correlated with decreased odds of optimal Quality of Life.
  • No significant associations were found for exposure variables and fatigue over time, nor in penalized regression models.

Conclusions:

  • The external exposome may be linked to fatigue severity and Quality of Life in long COVID.
  • Associations were not consistently found across all models, indicating a need for further research.
  • Findings suggest potential for optimizing living environments through urban planning and prevention strategies.