Post-COVID ConditionNCT07435805
Long-Term Health Effects of Previous Coronavirus Disease 2019 (COVID-19) in Patients Undergoing Preoperative Anesthesia Evaluation
An observational study of Post-COVID Condition and Long COVID, run by Elazıg Fethi Sekin Sehir Hastanesi at 1 site in Turkey (Türkiye).
Trial summary
The Coronavirus Disease 2019 (COVID-19) pandemic has resulted in persistent health problems in a significant proportion of individuals after recovery from the acute infection. These long-term manifestations, commonly referred to as post-COVID-19 condition or long COVID, may involve respiratory, cardiovascular… Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Post-COVID Condition, Long COVID, Sequelae of COVID-19
- What is being tested?
- Post-COVID Clinical Assessment
- How many people
- 400 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 1 Dec 2025to 20 Jun 2026
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: Adult patients aged 18 years and older presenting to the preoperative anesthesia clinic of Elazığ Fethi Sekin City Hospital who report a previous laboratory-confirmed COVID-19 infection. The study population consists of surgical candidates undergoing routine preoperative evaluation. Clinical information regarding the acute COVID-19 period will be obtained retrospectively from hospital records, and persistent post-COVID symptoms will be assessed at the time of preoperative evaluation using a structured questionnaire.
Who may be able to join
- Age ≥18 years
- Presentation to the preoperative anesthesia clinic
- Self-reported history of laboratory-confirmed COVID-19 infection
- Ability to provide informed consent
- Willingness to complete the post-COVID clinical questionnaire
Who cannot join
- Age <18 years
- No history of COVID-19 infection
- Refusal to participate or incomplete questionnaire
- Cognitive impairment or communication difficulties preventing reliable data collection
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Long-Term Clinical and Health Effects of Previous Coronavirus Disease 2019 (COVID-19) in Patients Presenting for Preoperative Anesthesia Evaluation
The Coronavirus Disease 2019 (COVID-19) pandemic has resulted in persistent health problems in a significant proportion of individuals after recovery from the acute infection. These long-term manifestations, commonly referred to as post-COVID-19 condition or long COVID, may involve respiratory, cardiovascular, neurological, psychological, and general health domains. Understanding these sequelae is particularly important in patients undergoing preoperative anesthesia evaluation, as residual symptoms may influence perioperative risk assessment and clinical decision-making. This cross-sectional observational study aims to evaluate the long-term clinical and health effects of previous COVID-19 infection in adult patients presenting to the preoperative anesthesia clinic. Patients aged 18 years and older who report a history of confirmed COVID-19 infection will be included. Clinical data related to the acute infection period (disease severity, hospitalization, intensive care unit (ICU) admission, oxygen therapy, and radiological findings) will be retrospectively obtained from hospital records. At the time of preoperative assessment, participants will complete a structured post-COVID-19 clinical questionnaire to evaluate persistent symptoms across multiple organ systems. The study seeks to determine the prevalence and characteristics of long-term post-COVID-19 symptoms and to explore potential associations between acute disease severity and ongoing health complaints. No additional medical intervention will be performed as part of this research.
- Conditions
- Post-COVID Condition, Long COVID, Sequelae of COVID-19
- Being tested
- Post-COVID Clinical Assessment
- Keywords
- Post-COVID Condition, Preoperative Assessment, Cross-Sectional Study, COVID-19 Sequelae
- Medical subject headings
- Post-Acute COVID-19 Syndrome
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Post-COVID Clinical AssessmentOther
Structured post-COVID symptom questionnaire and retrospective clinical data review performed at the time of preoperative anesthesia evaluation. No therapeutic intervention is applied.
| Study group | Role | What they receive |
|---|---|---|
| Previous COVID-19 Patients | Adult patients (≥18 years) presenting to the preoperative anesthesia clinic who report a history of laboratory-confirmed COVID-19 infection. Clinical data related to the acute infection period will be retrospectively obtained from hospital records, and persistent post-COVID symptoms will be assessed using a structured questionnaire at the time of preoperative evaluation. Receives: Other: Post-COVID Clinical Assessment |
What is being measured
The primary outcome is the main question the study is designed to answer.
Prevalence of Persistent Post-COVID Symptoms
Assessment of respiratory, cardiovascular, neurological, psychological, and general health symptoms using a structured post-COVID clinical questionnaire administered during preoperative anesthesia evaluation.
Measured: At the time of preoperative anesthesia assessment
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted27 Feb 2026
- Study start1 Dec 2025
- Primary completion1 Jun 2026
- Study completion20 Jun 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Post-COVID ConditionStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Other
- Time perspective
- Cross-sectional
- Enrolment
- 400 participants (actual)
Sponsor and investigators
- Lead sponsor
- Elazıg Fethi Sekin Sehir Hastanesi
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Oğuz Kağan Bulut, Elazıg Fethi Sekin Sehir Hastanesi
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07435805
- Sponsor's protocol ID
- EFSH-ANES-2025-19-23
- Status last verified
- Sep 2026
- First submitted
- 21 Feb 2026
- Last updated
- 11 Sep 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 11 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Long-Term Clinical and Health Effects of Previous Coronavirus Disease 2019 (COVID-19) in Patients Presenting for Preoperative Anesthesia Evaluation
- ClinicalTrials.gov ID
- NCT07435805
- Acronym / sponsor ID
- EFSH-ANES-2025-19-23
- Conditions
- Post-COVID Condition, Long COVID, Sequelae of COVID-19
- Keywords
- Post-COVID Condition, Preoperative Assessment, Cross-Sectional Study, COVID-19 Sequelae
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 400 participants (actual)
- Lead sponsor
- Elazıg Fethi Sekin Sehir HastanesiUniversity, hospital or other
- Study start
- 1 Dec 2025 (actual)
- Primary completion
- 1 Jun 2026 (actual)
- Study completion
- 20 Jun 2026 (actual)
- First posted
- 27 Feb 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The Coronavirus Disease 2019 (COVID-19) pandemic has resulted in persistent health problems in a significant proportion of individuals after recovery from the acute infection. These long-term manifestations, commonly referred to as post-COVID-19 condition or long COVID, may involve respiratory, cardiovascular, neurological, psychological, and general health domains. Understanding these sequelae is particularly important in patients undergoing preoperative anesthesia evaluation, as residual symptoms may influence perioperative risk assessment and clinical decision-making. This cross-sectional observational study aims to evaluate the long-term clinical and health effects of previous COVID-19 infection in adult patients presenting to the preoperative anesthesia clinic. Patients aged 18 years and older who report a history of confirmed COVID-19 infection will be included. Clinical data related to the acute infection period (disease severity, hospitalization, intensive care unit (ICU) admission, oxygen therapy, and radiological findings) will be retrospectively obtained from hospital records. At the time of preoperative assessment, participants will complete a structured post-COVID-19 clinical questionnaire to evaluate persistent symptoms across multiple organ systems. The study seeks to determine the prevalence and characteristics of long-term post-COVID-19 symptoms and to explore potential associations between acute disease severity and ongoing health complaints. No additional medical intervention will be performed as part of this research.
Study design
- Observational model
- Other
- Time perspective
- Cross-sectional
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Previous COVID-19 Patients | – | Other: Post-COVID Clinical AssessmentAdult patients (≥18 years) presenting to the preoperative anesthesia clinic who report a history of laboratory-confirmed COVID-19 infection. Clinical data related to the acute infection period will be retrospectively obtained from hospital records, and persistent post-COVID symptoms will be assessed using a structured questionnaire at the time of preoperative evaluation. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- Adult patients aged 18 years and older presenting to the preoperative anesthesia clinic of Elazığ Fethi Sekin City Hospital who report a previous laboratory-confirmed COVID-19 infection. The study population consists of surgical candidates undergoing routine preoperative evaluation. Clinical information regarding the acute COVID-19 period will be obtained retrospectively from hospital records, and persistent post-COVID symptoms will be assessed at the time of preoperative evaluation using a structured questionnaire.
Key inclusion criteria (5 listed)
- Age ≥18 years
- Presentation to the preoperative anesthesia clinic
- Self-reported history of laboratory-confirmed COVID-19 infection
- Ability to provide informed consent
- Willingness to complete the post-COVID clinical questionnaire
Key exclusion criteria (4 listed)
- Age <18 years
- No history of COVID-19 infection
- Refusal to participate or incomplete questionnaire
- Cognitive impairment or communication difficulties preventing reliable data collection
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Post-COVID Clinical AssessmentStructured post-COVID symptom questionnaire and retrospective clinical data review performed at the time of preoperative anesthesia evaluation. No therapeutic intervention is applied. | Other | Previous COVID-19 Patients |
Primary outcome
Prevalence of Persistent Post-COVID Symptoms
Time frame: At the time of preoperative anesthesia assessment
Assessment of respiratory, cardiovascular, neurological, psychological, and general health symptoms using a structured post-COVID clinical questionnaire administered during preoperative anesthesia evaluation.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 11 Sep 2026.
Related trials for Post-COVID Condition
Not yet recruitingPhase 1
Phase I Open-Label Safety Trial of Pembrolizumab for Neurological Post- Acute Sequelae of SARS-CoV-2 (PD1-PASC I)
Post-Acute COVID-19 Syndrome
Recruiting
Home-Based Exercise Tele-Rehabilitation After COVID-19
Post SARS-CoV2 (COVID-19)
Recruiting
Whole-body Cryotherapy in Those With Chronic Fatigue: A Feasibility Study
ME/CFS, Fibromyalgia (FM)
Not yet recruitingPhase 3
The Study of Brave-LC LDN Treatment Trial
Post-acute COVID-19 Syndrome
Active, not recruitingObservational study
Epigenetic Changes in Long COVID Patients
Long COVID-19 Syndrome, Long COVID Symptoms
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Post-COVID Condition and Long COVID, run by Elazıg Fethi Sekin Sehir Hastanesi at 1 site in Turkey (Türkiye).
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 5 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 11 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Turkey (Türkiye). Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Prevalence of Persistent Post-COVID Symptoms (time frame: At the time of preoperative anesthesia assessment). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 11 Sep 2026.