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The aim of the study is to investigate the frequency of thromboembolic complications and the factors influencing them in COVID-19 cases that did not require hospitalization. For this purpose, patients registered at two different family health centers in Istanbul were retrospectively screened, and their status regarding post-COVID-19 thromboembolic events was recorded. The sociodemographic characteristics, medical history, COVID-19 treatments received, comorbidities, and current medications of all patients were examined and compared with the occurrence of complications.
Studies on COVID-19 complications in the literature have predominantly focused on patients treated in hospitals, particularly in intensive care units. Data on patients with mild to moderate symptoms who were followed up on an outpatient basis in primary care are quite limited. Therefore, our research investigated the incidence of thrombotic events within six months following infection in mild to moderate COVID-19 cases and the factors that might influence these events. Records of 961 individuals registered at two different family health centers in Istanbul were reviewed. Patients were contacted by phone, informed about the study, and data regarding their sociodemographic characteristics, medical histories, COVID-19 infection experiences, and medications used were collected. Comparative analyses (Fisher's exact test) and logistic regression tests were conducted.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Patients with a PCR-confirmed COVID-19 diagnosis who were followed up on an outpatient basis |
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| Measure | Description | Time Frame |
|---|---|---|
| The frequency of thromboembolic complications in COVID-19 patients not requiring hospitalization. | Patients registered at a family health center were retrospectively reviewed, and those with a history of COVID-19 PCR positivity who had been followed up as outpatients were included. The occurrence of venous or arterial thromboembolism within the first 6 months after infection was recorded from their medical reports, and the frequency was calculated. | january-june 2022 |
| The relationship between patients' comorbidities and the occurrence of thromboembolic events post-COVID. | The patients' existing chronic conditions from the time of their COVID-19 infection were recorded by reviewing the family medicine system. The presence of chronic diseases was then analyzed in comparison to the occurrence of thrombosis within the first 6 months following COVID-19 infection. | january-june 2022 |
| The relationship between patients' medications and the occurrence of thromboembolic events post-COVID. | The medications regularly used by patients for their chronic conditions since the time of their COVID-19 infection were noted by reviewing records in the family medicine system. These medications were then analyzed in comparison to the occurrence of thrombosis within the first 6 months following COVID-19 infection. | january-june 2022 |
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Inclusion Criteria:
Exclusion Criteria:
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Patients over the age of 18 who were registered at family health centers in two different districts of Istanbul and had a confirmed COVID-19 infection verified by PCR test between January 1, 2022, and June 30, 2022, were included in the study.
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| Name | Affiliation | Role |
|---|---|---|
| BuÄŸu Usanma Koban | Marmara University Medical Faculty | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Marmara University Medical School | Istanbul | Turkey (Türkiye) |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 37029943 | Background | Azevedo-Cerqueira A, Torrao Pinheiro P, Oliveira J, Manuel-Marques M, Rocha Neves J. Risk Of Venous Thrombosis In The Primary Care Setting During The Covid-19 Pandemic. Port J Card Thorac Vasc Surg. 2023 Apr 4;30(1):43-47. doi: 10.48729/pjctvs.310. | |
| 35387772 | Background | Katsoularis I, Fonseca-Rodriguez O, Farrington P, Jerndal H, Lundevaller EH, Sund M, Lindmark K, Fors Connolly AM. Risks of deep vein thrombosis, pulmonary embolism, and bleeding after covid-19: nationwide self-controlled cases series and matched cohort study. BMJ. 2022 Apr 6;377:e069590. doi: 10.1136/bmj-2021-069590. |
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The research data may be shared anonymously with researchers if needed.
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| ID | Term |
|---|---|
| D000086382 | COVID-19 |
| D054556 | Venous Thromboembolism |
| D013923 | Thromboembolism |
| D011655 | Pulmonary Embolism |
| D020246 | Venous Thrombosis |
| ID | Term |
|---|---|
| D011024 | Pneumonia, Viral |
| D011014 | Pneumonia |
| D012141 | Respiratory Tract Infections |
| D007239 | Infections |
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| 40747374 | Derived | Usanma Koban B, Celik O, Sur Unal U, Uzuner A. Assessing the Burden of Thromboembolic Complications in Outpatient COVID-19 Cases: A Focused Study on Patients Followed in Primary Care. Can J Infect Dis Med Microbiol. 2025 Jul 24;2025:7242450. doi: 10.1155/cjid/7242450. eCollection 2025. |
| D014777 |
| Virus Diseases |
| D018352 | Coronavirus Infections |
| D003333 | Coronaviridae Infections |
| D030341 | Nidovirales Infections |
| D012327 | RNA Virus Infections |
| D008171 | Lung Diseases |
| D012140 | Respiratory Tract Diseases |
| D016769 | Embolism and Thrombosis |
| D014652 | Vascular Diseases |
| D002318 | Cardiovascular Diseases |
| D004617 | Embolism |
| D013927 | Thrombosis |