Prevalence and Risk Factors for Long COVID among California Workers Captured by a Doctor's First Report-Based Surveillance System

Abstract

Objective: To understand prevalence and risk factors for long COVID among California workers.

Methods: Using a cross-sectional study design, we analyzed 4,496 Doctor's First Reports of Occupational Injury or Illness (DFRs) used for tracking work-related COVID-19 exposure or illnesses. Logistic regression was used to assess the risk factors.

Results: With a prevalence of 11%, long COVID cases were slightly higher among male workers, workers aged between 45 - 54 years, and those in essential industries. Over 30 days of lost work was 13 times more prevalent among long COVID cases compared to acute cases. Age, presenting symptoms, and working in mixed essential industries increased long COVID risk.

Conclusion: These findings highlight long COVID burden on workers' health and productivity. Proactive measures are crucial to safeguard workers' health.

Keywords: long COVID; occupational health; post-acute sequalae of SARS-CoV-2; surveillance; workers.