Impact of the COVID-19 Pandemic on Telogen Effluvium: A Nationwide Multicentre Interrupted Time Series Study

    September 2024 in “ Clinical and Experimental Dermatology
    Jee Woong Choi, Hyoung Soo Park, Sang Seok Kim, Chang‐Hun Huh, Oh Sang Kwon, Bark‐Lynn Lew, Moon Bum Kim
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    TLDR COVID-19 increased hair loss cases, but vaccination did not.
    This nationwide multicentre study in South Korea analyzed data from 22 hospitals between 2017 and 2022 to investigate the impact of the COVID-19 pandemic and vaccination on telogen effluvium (TE). The results showed a significant increase in TE cases following the pandemic (slope change 0.011, 95% CI 0.005–0.017, P < 0.001), but no significant changes were observed after vaccination. Other types of hair loss were not associated with COVID-19 or vaccination. The study's retrospective nature may limit the ability to establish causation.
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