An observational study in COVID-19, Coronavirus Infections and Seroprevalence, sponsored by Centre Hospitalier de Saint-Denis. Completed at 1 site in France. Per ClinicalTrials.gov, last updated 2025-05-31.
Sponsored by Centre Hospitalier de Saint-Denis · Observational
This study looks at how many healthcare workers at CHSD have developed antibodies against COVID-19 after the second and third waves of the pandemic and following vaccination. By testing blood samples, we want to understand how well healthcare workers are protected, which work areas might be more at risk, and how immunity changes over time after infection or vaccination.
7,774 studies on the registry are indexed under COVID-19; 482 are open to participants now.
This study's enrollment of 76 is below the median of 260 across 3,188 observational studies indexed under COVID-19.
Browse COVID-19 studies →Centre Hospitalier de Saint-Denis is the lead sponsor of 45 studies on the registry; 19 are open to participants now.
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The study population consists of adult patients who underwent surgical treatment for closed, isolated, and displaced fractures of the humeral shaft. These patients were treated with percutaneous anterograde intramedullary nailing using dynamic distal locking between January 2008 and June 2018. The population includes both men and women, with a mean age of approximately 53 years. Only patients with fractures classified as type A, B, or C according to the AO/OTA classification and who were available for follow-up evaluation were included. Patients with open fractures, non-isolated or non-displaced fractures, or those lost to follow-up were excluded.
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Exclusion Criteria:
The seroprevalence of SARS-CoV-2 antibodies among healthcare workers at CHSD following COVID-19 vaccination and previous infection.
Time frame: January 2008 - June 2018
Ran from Jan 2020 to primary completion in Jan 2021, 12 months.
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This study is completed, as verified in May 2025. You cannot join it, but the record below documents what was studied.
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Centre Hospitalier de Saint-Denis