Clinical trial Recruiting at 1 site Observational

Impact of COVID-19 on surgical patients

Official title: What Are the Effects of the Covid-19 Pandemic Among Operated Patients? A Hospital Based Cohort in Stockholm, Sweden

Run by Karolinska Institutet · NCT04525716 · Data updated 2026-11-12

This study looks at how having COVID-19 affects the recovery and hospital stay of patients who are having surgery compared to those who don’t have the virus.

Quick facts

Study typeObservational
SexAll
Enrollment300000 (estimated)
SponsorKarolinska Institutet
Academic / other
Locations1 site (Stockholm)
StatusRecruiting
StartedJanuary 1, 2020
Main results expectedDecember 31, 2027
Study endsDecember 31, 2029
Registry record updatedNovember 26, 2025
Trial IDNCT04525716 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates include patients undergoing surgical treatment in the Stockholm Region during the study period.

Probably not a fit

Patients who are not undergoing surgery or those outside the Stockholm Region may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational study aims to compare outcomes between patients undergoing surgery who are confirmed to have COVID-19 and those who do not have the virus. By analyzing data from electronic healthcare records and regional data systems, the study will assess various factors that may influence surgical outcomes, including complications and hospital stay duration. The goal is to enhance the understanding of how COVID-19 affects surgical management and patient care during the pandemic.

Why it matters

Potential benefit: If successful, this study could provide critical insights that improve surgical treatment strategies for patients affected by COVID-19.

How similar studies have gone: While there have been studies examining COVID-19's impact on various health conditions, this specific focus on surgical outcomes is relatively novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patients that undergo surgical treatment in the Stockholm Region during the study period

Exclusion Criteria:

\-

Where it's running

  • All acute care hospitals in Region Stockholm
    Stockholm, Sweden
    Recruiting

Study contacts

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.