| Not Yet Recruiting | Mental Health of Professionals of the Silver Economy of New Aquitaine : Online Survey of Accommodation Establi NCT05381883 | Centre Hospitalier Charles Perrens, Bordeaux | N/A |
| Not Yet Recruiting | Study on the Effect of Incentive Spirometer-based Respiratory Training on the Long COVID-19 NCT06231225 | National Taipei University of Nursing and Health Sciences | N/A |
| Not Yet Recruiting | Use of Artificial Intelligence (AI) to Predict Clinical Outcomes in Patients Hospitalized for COVID19 Pneumoni NCT06424925 | Azienda Ospedaliera di Lecco | — |
| Terminated | SMILE: Clinical Trial to Evaluate Mindfulness as Intervention for Racial and Ethnic Populations During COVID-1 NCT06242080 | University of North Carolina, Chapel Hill | N/A |
| Completed | Neural Network-Based Prediction in Critical COVID-19 Patients NCT07436572 | University of Gaziantep | — |
| Unknown | UNAIR Inactivated COVID-19 Vaccine as Homologue Booster (Immunobridging Study) NCT06259578 | Dr. Soetomo General Hospital | EARLY_Phase 1 |
| Completed | Reducing COVID-19 Vaccine Hesitancy Among Hispanic Parents NCT06036134 | Arizona State University | N/A |
| Completed | Left Atrial Function of COVID-19-recovered Patients During the Surge of Omicron Variants NCT06170307 | Haiyan Wang | — |
| Unknown | UNAIR Inactivated COVID-19 Vaccine INAVAC as Heterologue Booster (Immunobridging Study) in Adolescent Subjects NCT06272253 | Dr. Soetomo General Hospital | EARLY_Phase 1 |
| Completed | Community-engaged Optimization of COVID-19 Rapid Evaluation And TEsting Experiences NCT05894655 | University of California, San Diego | N/A |
| Withdrawn | 3D Printed Mask Adapter Designed From Facial 3D Scans for Fit Testing. NCT05143814 | Barts & The London NHS Trust | — |
| Completed | A Coping and Resilience Intervention in Adolescents NCT05830188 | Taipei Medical University | N/A |
| Withdrawn | Lollipop COVID-19 Testing Study NCT05472077 | University of Wisconsin, Madison | N/A |
| Unknown | A Telemedicine Prenatal Care Model on Low Risk Pregnants: The m@Mae-e Study NCT05745896 | Talita Colombo | N/A |
| Unknown | INAVAC Vaccine Phase III (Immunobridging Study) in Healthy Population Aged 12 to 17 Years Old NCT06282692 | Dr. Soetomo General Hospital | Phase 3 |
| Withdrawn | A Phase 1, Randomised, Double-blinded, Placebo-controlled, Dose-escalation Study to Evaluate the Safety and Im NCT05609045 | Wuhan Rhegen Biotechnology Co., Ltd. | Phase 1 |
| Completed | The Practice of Providing Palliative Care in the Situation of the COVID-19 Pandemic NCT05089032 | Masaryk University | — |
| Active Not Recruiting | Long COVID and Its Associations With Health Outcomes in Older Adults NCT05825651 | Peking University | — |
| Recruiting | Corona Virus Disease 2019 Cohort Study NCT06927622 | Shandong University | — |
| Unknown | Lifestyle Changes by the COVID-19 (Coronavirus Disease 2019) Pandemic in Children With Developmental Delays NCT05770362 | Taipei Medical University | — |
| Completed | Feasibility and Usability of COVID-19 Antigen RDTs in Uganda NCT05630300 | PATH | N/A |
| Withdrawn | Leidos-Enabled Adaptive Protocol for Clinical Trials (LEAP-CT) in Hospitalized Patients With COVID-19 (Addendu NCT05085574 | Leidos Life Sciences | Phase 2 |
| Completed | Retinal and Choroidal Microvascular Parameters in School-age Children in a COVID-19 Infection Pandemic Peak in NCT05952466 | Guangzhou First People's Hospital | — |
| Completed | COVID-Related Tinnitus Timeline NCT07199972 | Faculdade de Medicina de Valenca | — |
| Completed | COVID-19 Pandemic Induced Stress and Symptoms NCT06036251 | University of California, San Francisco | — |
| Completed | A PhaseⅡ Study to Evaluate the Safety & Immunogenicity of SARS-CoV-2 Alpha/Beta/Delta/Omicron Variants COVID-1 NCT05652543 | Sinocelltech Ltd. | Phase 2 |
| Unknown | A Cross-sectional Study of Covid-19 Pandemic in Zhejiang Province NCT05668052 | The First Affiliated Hospital of Zhejiang Chinese Medical University | — |
| Completed | ABO Blood Group Type Association With COVID-19 Severity NCT05859958 | Arrowhead Regional Medical Center | — |
| Completed | Baby2Home (B2H) Mobile Health Application NCT05595486 | Women and Infants Hospital of Rhode Island | N/A |
| Completed | Effectiveness of Online Mindfulness Platform in Improving Anxiety, Depression, and Stress in Adult NCT06613529 | Taipei Medical University | N/A |
| Completed | Prospective Study to Validate the Diagnostic Performance of IVD CAPSULE COVID-19-NP Test for the Detection of NCT05596032 | Abionic SA | — |
| Completed | A Study of FB2001 for Inhalation in Healthy Chinese Adults NCT05583812 | Frontier Biotechnologies Inc. | Phase 1 |
| Terminated | SARS-CoV-2 OTC At Home Test NCT05553964 | 3EO Health | N/A |
| Completed | Effects of an Immersive Virtual Reality Intervention Combined With Mindfulness-based Stress Reduction NCT05517148 | Nanjing University of Traditional Chinese Medicine | N/A |
| Completed | Towards Better Preparedness for Future Catastrophes - Local Lessons-learned From COVID-19 NCT05552989 | University Hospital Heidelberg | — |
| Unknown | A Preliminary Exploratory Study to Evaluate the Safety and Immunogenicity of Omicron Variant Bivalent Vaccine NCT05585567 | Livzon Pharmaceutical Group Inc. | EARLY_Phase 1 |
| Completed | COVID-19 Testing and Vaccine Literacy for Women With Criminal Legal System Involvement NCT05582746 | University of Kansas Medical Center | N/A |
| Completed | Safety and Immunogenicity of Omicron Variant-Matched Vaccine Booster in Adults NCT05383560 | Sheba Medical Center | Phase 2 |
| Unknown | UNAIR Inactivated COVID-19 Vaccine as Heterologue Booster (Immunobridging Study) NCT05918939 | Dr. Soetomo General Hospital | EARLY_Phase 1 |
| Completed | Effects of Diagrammatic Breathing With and Without Resistance in Post Covid Patients on ADLs NCT05543551 | Riphah International University | N/A |
| Completed | Research on Community Based ATK Test Study to Control Spread of COVID-19 in Migrant Community NCT05557513 | University of Oxford | N/A |
| Unknown | Exploratory Clinical Study to Evaluation of the Safety and Immunogenicity of Bivalent Vaccine V-01D-351 NCT05583357 | Livzon Pharmaceutical Group Inc. | EARLY_Phase 1 |
| Completed | Motivation, Syringe Exchange, and COVID-19 NCT05534061 | University of Oregon | N/A |
| Completed | Chlorpheniramine Nasal Spray to Accelerate COVID-19 Clinical Recovery in an Outpatient Setting: ACCROS-III NCT05886829 | Dr. Ferrer BioPharma | Phase 2 / Phase 3 |
| Unknown | With Continuity of Covid-19 Pandemic, Have Our Anethetic Choices for Caesrean Section Changed ? NCT05513287 | Shereen salah | — |
| Active Not Recruiting | Getting to Yes, Michigan! (G2YMI) NCT05096260 | University of Michigan | N/A |
| Completed | SARS-CoV-2 Nucleic Acid Detection Kit Clinical Performance Study NCT05492227 | TransGen Biotech Co., LTD | — |
| Withdrawn | Safety, Reactogenicity, and Immunogenicity Study of a Lyophilized COVID-19 mRNA Vaccine NCT05366296 | Wuhan Recogen Biotechnology Co., Ltd. | Phase 1 |
| Completed | Nutritional Status of Adult Slovenes After the Covid-19 Epidemic NCT05438966 | Barbara Jakše s.p. | — |
| Unknown | UNAIR Inactivated COVID-19 Vaccine Phase III (Immunobridging Study) NCT05508477 | Dr. Soetomo General Hospital | Phase 3 |
| Unknown | COVID-19 and Mental Health in Eure NCT05364060 | Centre Hospitalier Eure-Seine | — |
| Completed | Older Adults' Perceptions of the Impact COVID-19 Pandemic NCT05379426 | Rsocialform - Geriatria, Lda | — |
| Unknown | Knowledge and Attitude of a Group of Egyptian Parents Toward Dental Treatment of Their Children During the Fou NCT05094739 | Cairo University | — |
| Completed | MiVacunaLA: an Intervention to Improve COVID-19 Vaccination Behaviors Among Latinos NCT05234372 | Cedars-Sinai Medical Center | N/A |
| Unknown | Intraoperative Lung Mechanics and Functional Evaluation in Post COVID-19 Thoracotomy Patients NCT05851807 | Ankara University | — |
| Completed | Impact of Vitamin D Supplementation on COVID-19 Vaccine Response and IgG Antibodies in Deficient Women. NCT05447065 | Ege University | N/A |
| Completed | Evaluation of the AudibleHealth Dx AI/ML-Based Dx SaMD Using FCV-SDS in the Diagnosis of COVID-19 Illness: Cli NCT05364268 | AudibleHealth AI, Inc. | — |
| Unknown | COVID-19, Obesity and Lifestyle in Children - Role of Professionals NCT05336591 | Maastricht University Medical Center | — |
| Unknown | EFFECT OF LOW DOSE INTRAVENOUS KETAMINE GIVEN BEFORE INDUCTION ON POSTOPERATIVE COGNITIVE FUNCTIONS IN PATIENT NCT05323422 | Kocaeli Derince Education and Research Hospital | — |
| Completed | COVID-19 Molecular OTC At Home Test NCT05704803 | 3EO Health | N/A |
| Unknown | PROlectin M, a Nucleocapsid TErminal GaleCTin Antagonist for COVID-19 NCT05096052 | Bioxytran Inc. | Phase 3 |
| Completed | Maternal and Fetal Outcomes in Pregnant Women With COVID -19,a Cross Sectional Study NCT05608616 | Cairo University | — |
| Unknown | Effect of Covid-19 Vaccination on Male NCT05299307 | Assiut University | — |
| Unknown | Prevalence of Knowledge, Attitudes and Perception of Covid Vaccine in Iraq. A Cross Sectional Study NCT05256602 | AlFayhaa General Hospital | — |
| Completed | COVID-19 Among Children With Chronic Renal Diseases in Qatar NCT05275595 | Hamad Medical Corporation | — |
| Completed | Covid-19 Pandemic and Pediatric Dentistry NCT06352580 | Abant Izzet Baysal University | — |
| Unknown | Effects of an Immersive Virtual Reality Intervention NCT05637736 | Nanjing University of Traditional Chinese Medicine | N/A |
| Withdrawn | Intranasal INNA-051 for Prevention of COVID-19 in Adults NCT05118763 | ENA Respiratory Pty Ltd | Phase 2 |
| Completed | COVID-19, Patients' Evolution and the Influence of the Pandemic on Health Care and Outcomes in Chronic Disease NCT05168722 | Hospital Galdakao-Usansolo | — |
| Completed | Investigation of Physical and Emotional Status the Elderly Infected and Non-Infected With COVID-19 NCT05905211 | Tarsus University | — |
| Unknown | UNAIR Inactivated COVID-19 Vaccine NCT05226429 | Dr. Soetomo General Hospital | Phase 1 / Phase 2 |
| Completed | Diagnostic Accuracy of Self-sampling Versus Healthcare Sampling for Coronavirus-Disease-2019 Detection. NCT05209178 | Rigshospitalet, Denmark | N/A |
| Terminated | NanoMn®_COVID-19 A Prospective, Multicenter, Randomized, Placebo-controlled, Parallel-group, Double-blind Tria NCT05451654 | Medesis Pharma SA | Phase 1 / Phase 2 |
| Completed | Animation Supported COVID-19 Education NCT05633485 | Siirt University | N/A |
| Completed | Anesthetists After the Pandemic in the Eyes of the Public NCT05741320 | Ankara City Hospital Bilkent | — |
| Unknown | Indicators of Neuronal Insult in Newborns of COVID-19 Positive Mothers. NCT05175638 | Assiut University | — |
| Completed | Respiratory Physiotherapy and Neurorehabilitation in Patients With Post-covid19 Sequelae. NCT05195099 | Universidad Católica de Ávila | N/A |
| Completed | EVALUATION OF DIFFERENT PROPHYLACTIC INTERVENTIONS TOWARD COVID-19 IN SOLID ORGAN TRANSPLANT PATIENTS NCT05629923 | University of Rome Tor Vergata | — |
| Completed | Effect of FFP2 Masks on Peripheral Oxygen Saturation and Pulse Rate During the COVID-19 Pandemic NCT05188651 | Catholic University of the Sacred Heart | — |
| Unknown | Stress and Coping, Resilience, and Compassion Fatigue of Front-line Nurses During COVID-19 Pandemic NCT05205564 | National Taiwan University | — |
| Completed | The BOOSTED (Booster Options Or Switching Tested for Effectiveness and Downsides Study) Trial (COVID-19) NCT05268185 | University of California, San Francisco | N/A |
| Unknown | Retrospective Study of Pediatric Patients With Covid-19 in Alsace in 2020-2021 NCT06167980 | University Hospital, Strasbourg, France | — |
| Completed | Evaluation of Clinical Performance and Usability of iStatis COVID-19 Ag Rapid Test at POC NCT05514691 | bioLytical Laboratories | N/A |
| Unknown | The Immunogenicity and Safety of V-01-351/V-01D Bivalence Vaccine NCT05273528 | Livzon Pharmaceutical Group Inc. | Phase 2 |
| Completed | Home-Based Exercise Training in Older Adults During the COVID-19 Pandemic NCT05249764 | Baskent University | N/A |
| Unknown | Fourth COVID-19 Vaccine Dose- mRNA1273 NCT05230953 | Sheba Medical Center | Phase 3 |
| Unknown | Elevated Liver Enzymes as a Predictor of Acute Kidney Injury in Hospitalized Patients With COVID-19 NCT05157152 | Sohag University | — |
| Completed | LEAP-CT for Treatment of COVID-19 Patients (Master Protocol) NCT05077332 | Leidos Life Sciences | Phase 2 |
| Terminated | Leidos-Enabled Adaptive Protocol (LEAP-CT) for Evaluation of Post-exposure Prophylaxis for Newly-infected COVI NCT05077969 | Leidos Life Sciences | Phase 2 |
| Unknown | Fourth BNT162b2 COVID-19 Vaccine Dose NCT05231005 | Sheba Medical Center | Phase 4 |
| Completed | COVID-19 Messaging for Vaccination NCT05182554 | Massachusetts Institute of Technology | N/A |
| Completed | Comparison of Quality of Life After Discharge of the Mild and Moderate COVID-19 Patients With or Without Herba NCT05228873 | University of Medicine and Pharmacy at Ho Chi Minh City | — |
| Completed | Chlorpheniramine Nasal Spray to Accelerate COVID-19 Clinical Recovery in an Outpatient Setting: ACCROS-I NCT05449405 | Dr. Ferrer BioPharma | Phase 2 / Phase 3 |
| Completed | A Phase I/II Clinical Trial in Healthy People Aged 18 Years and Above NCT05144139 | Stemirna Therapeutics | Phase 1 / Phase 2 |
| Unknown | The Effect of the COVID-19 Epidemic Process on the Nutritional Habits and Body Weights of Adults NCT05115084 | Istanbul Medeniyet University | — |
| Completed | Examine the Psychosocial Impacts of COVID-19 Pandemic. NCT05052333 | University of Otago | — |
| Unknown | Multicentre Study to Record the Mental and Physical Effects of the COVID-19 Pandemic (COBESITY-Study) NCT05303012 | Universitätsklinikum Hamburg-Eppendorf | — |
| Unknown | Myopericarditis After Messenger Ribonucleic Acid (mRNA) COVID-19 Vaccination in Children 5-11 Years Old NCT05186571 | Rigshospitalet, Denmark | — |
| Completed | Investıgatıon Of The Effect Of The Pandemıc Process In Indıvıduals Wıth Chronıc Low Back And Neck Paın NCT05212870 | Hacettepe University | — |
| Completed | Prospective Study on COVID -19 Reinfection on Vaccinated and Non-vaccinated Outpatients NCT06544369 | Soad Ali | — |
| Unknown | Immunogenicity and Safety of Sequential Immunization of Recombinant SARS-CoV-2 Fusion Protein Vaccine NCT05238649 | Livzon Pharmaceutical Group Inc. | Phase 2 |
| Completed | COVID-19 Simulation Education on Nursing Students NCT05576636 | Mehmet Akif Ersoy University | N/A |
| Completed | Recombinant SARS-CoV-2 Fusion Protein Vaccine (V-01) Booster Study NCT05096832 | Livzon Pharmaceutical Group Inc. | Phase 3 |
| Completed | Evaluation of Corticosteroids Use and Clinical Outcomes in Hospitalized COVID-19 Patients: A Retrospective Stu NCT05844410 | Lebanese University | — |
| Completed | Self-Perceived in Medical Students Undergoing Distance Learning NCT05123573 | Instituto Mexicano del Seguro Social | — |
| Completed | A Phase I Study to Evaluate Safety, Tolerability, and Immunogenicity of a PIKA COVID-19 Vaccine in Healthy Ind NCT05305300 | Yisheng Biopharma (Singapore) Pte. Ltd. | Phase 1 |
| Completed | The Epidemiology, Management and Comorbidities in Alopecia Areata in Czech Republic NCT05098600 | Faculty Hospital Kralovske Vinohrady | — |
| Recruiting | Neural and Cognitive Consequences of COVID-19 Survival NCT06208943 | San Francisco Veterans Affairs Medical Center | — |
| Unknown | Clinical Study for Recombinant SARS-CoV-2 Fusion Protein Vaccine (V-01) Booster Immunization NCT05125874 | Livzon Pharmaceutical Group Inc. | N/A |
| Unknown | RCT on the Efficacy of Dexamethasone Versus Methyl Prednisolone in Covid-19 Infected Patients With High Oxygen NCT05062681 | Cairo University | Phase 4 |
| Completed | The Impact of Covid-19 Pandemic On The Children With Autism Spectrum Disorder NCT05197634 | Istanbul University | — |
| Unknown | Accelerating COVID-19 Clinical Recovery in the Outpatient Setting: Retrospective Analysis NCT05520944 | Dr. Ferrer BioPharma | — |
| Unknown | Recombinant SARS-CoV-2 Fusion Protein Vaccine (V-01) Phase III NCT05096845 | Livzon Pharmaceutical Group Inc. | Phase 3 |
| Completed | COVID-19 and Vitamin D: Length of Hospital Stay and Mortality NCT05221983 | Yuksek Ihtisas University | — |
| Unknown | Recombinant SARS-CoV-2 Fusion Protein Vaccine Booster Immunization Study to Evaluate the Safety and Immunogenc NCT05239832 | Livzon Pharmaceutical Group Inc. | Phase 2 |
| Completed | Socioeconomic Inequalities Exacerbated by Mitigation Measures to COVID-19 and Differences in Prematurity Preva NCT05087160 | Universidad de la Republica | — |
| Unknown | Incidence of MIS-C and Other Complications Following SARS-CoV-2 Infection NCT05186597 | Rigshospitalet, Denmark | — |
| Unknown | Investigating Development of Autoimmunity in Post-Acute COVID-19 Syndrome (PACS) NCT05459506 | McMaster University | — |
| Completed | Hacettepe University COVID-19 Vaccinated's Health Cohort- Students of Health Sciences NCT05104385 | Hacettepe University | — |
| Completed | The COVID-19 Pandemic Process Increase Latex Glove Use and Latex Allergy Complaints in Hospital Nurses? Survey NCT05515276 | Kilis 7 Aralik University | — |
| Completed | Safety and Efficacy of Enoxaparin and Hydroxychloroquine in COVID-19 NCT05311813 | Beni-Suef University | N/A |
| Completed | Oral Neutralizing Antibody Booster for Post-vaccinated People With COVID19 Vaccine NCT05158855 | DreamTec Research Limited | N/A |
| Completed | An E-health Psychoeducation for People With Bipolar Disorders NCT06296784 | University of Cagliari | N/A |
| Completed | Becoming a Parent During the COVID-19 Pandemic in Austria and Germany NCT05487105 | University of Salzburg | — |
| Completed | Seroprevalence of the Anti-SARS-CoV-2 Antibodies (Causing COVID-19) in Kidney Transplant Recipients in Severel NCT04874740 | University Hospital Ostrava | — |
| Completed | Physiotherapy in Mutated COVID-19 Patients NCT05874076 | Giresun University | N/A |
| Completed | Comparison of the Effect of Online Physical Exercise and Computerized Cognitive Stimulation in Patients With A NCT04842734 | Yeditepe University | N/A |
| Completed | The Impact of nCoV-2019 on Children With Migraine NCT06077006 | Bnai Zion Medical Center | — |
| Completed | Adjuvant Use Of Colchicine With The Standard Therapy In Moderate And Severe Corona Virus Disease-19 Infection NCT05151614 | University of Baghdad | Phase 1 |
| Completed | Increasing COVID-19 Testing in Chicago's African American Testing Desserts NCT05197452 | Rush University Medical Center | N/A |
| Completed | Smell in Covid-19 and Efficacy of Nasal Theophylline NCT04789499 | Washington University School of Medicine | Phase 2 |
| Completed | Effect of Yoga-based Exercises of Healthcare Workers During COVID-19 Pandemic: Prospective Clinical Trial NCT05279443 | Ankara City Hospital Bilkent | N/A |
| Completed | STREngthening COronavirus Disease 2019 (COVID-19) Surveillance in Africa NCT06170320 | Institut de Recherche pour le Developpement | — |
| Completed | COVID-19 Pandemic: Perception, Attitude NCT05743088 | Assiut University | — |
| Completed | Health System Dynamic & Resource Requirement in a South African COVID-19 Field Hospital NCT05113875 | University of Cape Town | — |
| Completed | Seasonal Factors and COVID 19 NCT05264948 | Izmir Katip Celebi University | — |
| Completed | Chronic Pain in COVID-19 Patients Discharged From Intensive Care Unit NCT04940208 | Mikhail Dziadzko, MD, PhD | — |
| Completed | Visual-OLfactory Training in Participants With COVID-19 Resultant Loss of Smell NCT04710394 | Washington University School of Medicine | N/A |
| Completed | Quality of Nursing Care During The Covid-19 Pandemic NCT05841602 | Tokat Gaziosmanpasa University | — |
| Completed | The Effect of Telemonitoring on Anxiety and Quality of Life in Patients in COVID 19 Quarantine NCT05197582 | Yuksek Ihtisas University | N/A |
| Completed | Evaluation of Telemedicine Practices for Contraceptive Counseling During the COVID-19 Pandemic: A Randomized C NCT05743309 | Fenerbahce University | N/A |
| Completed | External Validation of the 4C Mortality Score for Hospitalised Patients With COVID-19 in a Tunisian Cohort NCT05498324 | University of Monastir | — |
| Completed | Residual Symptoms and the Quality of Life in Individuals Recovered From COVID-19 Infection: A Survey From Paki NCT05148676 | Aga Khan University | — |
| Completed | Analysing the Psychosocial Effects of COVID-19 Pandemic on Dental Professionals Using the Turkish Version of t NCT04674644 | Suleyman Demirel University | N/A |
| Completed | Covid-19 Infection and Long-term Cardiovascular Symptoms NCT05715879 | Shiraz University of Medical Sciences | — |
| Completed | Post-ICU Follow-up Study in Covid-19 Patients NCT05299346 | Sahlgrenska University Hospital | — |
| Completed | The Combined Usage of Clinical Physical Finding in Management of COVID 19 Patients NCT06528119 | St. Martin De Porress Hospital | — |
| Completed | Burnout Among Adolescent Population During Covid-19 Lockdown in Pakistan NCT04697030 | Sialkott College of Physical Therapy | — |
| Completed | STEP-COVID: A Program for Pregnant Women During the SARS-CoV-2 Pandemic NCT05419167 | Université du Québec à Trois-Rivières | Phase 1 |
| Completed | Effect of Hand-Washing Training in Covid-19 NCT04957017 | Mehmet Akif Ersoy University | N/A |
| Completed | Infection Prevention and Control Practices Regarding COVID-19 NCT05130749 | King Saud University | — |
| Completed | Cutaneous Manifestations of Coronavirus Disease 2019(COVID-19). NCT05094687 | Jinnah Postgraduate Medical Centre | — |
| Completed | Perceived Impact of the COVID-19 Pandemic on Medical Management and Symptoms in a High Risk Group NCT04477473 | University Hospital, Geneva | — |
| Completed | Therapeutic Melodies: How Classical Turkish Music Soothes Stress and Eases Loneliness NCT05859893 | Ege University | N/A |
| Completed | Psychological Distress During COVID-19 Pandemic NCT05307588 | Beni-Suef University | — |
| Completed | Psychological Effects of the COVID-19 Pandemic on the Hungarian Adult Population NCT04426266 | Szeged University | — |
| Completed | Hormonal Contributors to COVID-19 Infection (COV-ENDO) NCT05749770 | Istituto Auxologico Italiano | — |
| Unknown | The Offer of Neurosurgery Care in the Grand Est of France During the Health Crisis Linked to Covid-19 NCT04701905 | University Hospital, Strasbourg, France | — |
| Completed | Primary Care in AURA for COVID-19 NCT05124145 | Research on Healthcare Performance Lab U1290 | — |
| Completed | Famotidine in Covid-19 Intensive Care Unit NCT05122208 | Istanbul Medeniyet University | — |
| Unknown | University Hospital of Ioannina COVID-19 (Coronavirus Disease 2019) Registry NCT05534074 | University Hospital, Ioannina | — |
| Completed | Obesity: an Underappreciate Risk Factor for Severe Form of COVID-19 NCT05771857 | Mohammed VI University Hospital | — |
| Completed | The Impact of COVID-19 Pandemic on Clinical Presentation and Staging of Gastric Cancer NCT05130710 | Tehran University of Medical Sciences | — |
| Completed | External Validation of Simplified 4C Mortality Score by Deleting CRP NCT06354946 | University of Monastir | — |
| Completed | Investigation on the Epidemic Prevention Effect of Using Chinese Medicine During the Severe Acute Respiratory NCT05236309 | Taipei City Hospital | — |
| Completed | Staff Absenteeism and Delivery of Healthcare Services During the COVID-19 Pandemic NCT04521010 | Poznan University of Medical Sciences | — |
| Completed | The Impact of Covid 19 Pandemic on the Training of General Surgery Residents NCT05069116 | Iuliu Hatieganu University of Medicine and Pharmacy | — |
| Completed | Coronavirus Disease 2019 (COVID-19) Pandemic on the Oral Hygiene Status of Children NCT06435390 | Gazi University | — |
| Completed | Ambulance Calls for Substance Use and Alcohol in a Pandemic (ASAP) NCT04474444 | University of Lincoln | — |
| Completed | The Impact of the Covid-19 Pandemic on Orthopedic Trauma Management NCT06237023 | Bakirkoy Dr. Sadi Konuk Research and Training Hospital | N/A |
| Completed | Routine Surgical Procedures During COVID-19 Pandemic: a French Nationwide Cohort Study NCT05197660 | EPI-PHARE | — |
| Completed | Impact of SARS-Cov2 Pandemic on Severity of Perioperative Complications in Patients Undergoing Appendectomy NCT05178251 | Central Hospital, Nancy, France | — |
| Completed | Admission Pattern Among Children With Gastro-intestinal Infections Before and During the Covid-19 Pandemic NCT06211621 | Region Zealand | — |