Coronavirus Disease 2019 VaccinesNCT04944433
Safety and Efficacy of the Coronavirus Disease 2019 Vaccine in Hemodialysis Patients
An observational study of Coronavirus Disease 2019 Vaccines and Renal Dialysis, run by Hospital Italiano de Buenos Aires at 1 site in Argentina.
Trial summary
It is unknown whether Coronavirus disease 2019 vaccines confer the same high level of protection in patients with kidney disease as reported for participants in recent trials, who were generally healthy. Objectives: To evaluate the safety and efficacy of Coronavirus disease 2019 vaccines in hemodialysis patients. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Coronavirus Disease 2019 Vaccines, Renal Dialysis
- How many people
- 950 participants
- Where
- 1 siteArgentina
- Study dates
- 9 Apr 2021to 4 Aug 2022
- 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
- Adult, Older adult
Study population: Hemodialysis patients in an immunization plan with a COVID-19 vaccine from the hemodialysis centers of the Autonomous City of Buenos Aires
Who may be able to join
- Patients over 18 years of age on hemodialysis in an immunization plan with a Coronavirus disease 2019 vaccine.
Who cannot join
- Contraindication to receive the vaccine.
Trial locations and contacts
1 site in 1 country.
Argentina1 site
Universidad de Buenos Aires Facultad de Medicina
Buenos Aires, Buenos Aires F.D., 1121A6B
About this study
It is unknown whether Coronavirus disease 2019 vaccines confer the same high level of protection in patients with kidney disease as reported for participants in recent trials, who were generally healthy. Objectives: To evaluate the safety and efficacy of Coronavirus disease 2019 vaccines in hemodialysis patients.
Read the detailed description
Given the vulnerability of people with chronic kidney disease to Coronavirus 2019 , leading nephrology societies such as the National Kidney Federation and the American Kidney Foundation have issued statements calling for prioritization of these patients for vaccination. It is unknown whether Coronavirus disease 2019 vaccines confer the same high level of protection in patients with kidney disease as reported for participants in recent trials, who were generally healthy.
Objectives:
- Estimate the proportion of hemodialysis patients who present events supposedly attributed to vaccines and immunizations after having received a Coronavirus disease 2019 vaccine
- Determine the levels of Immunoglobulin G antibodies in patients who received a Coronavirus disease 2019vaccine between the time before the first dose, at 21 days, at 40 days and at 120 days after immunization.
Methods Design: Multicenter, observational and analytical study of a prospective cohort of hemodialysis patients 18 years and older who received immunization with a Coronavirus disease 2019 vaccine in the Autonomous City of Buenos Aires in a vaccination plan.
Analysis The proportion of patients with Adverse events presumably attributable to vaccination and immunization will be estimated with its 95% confidence interval. The immunoglobulin G titer for coronavirus type 2 causing severe acute respiratory syndrome will be compared using Generalized Estimating Equations models.
- Conditions
- Coronavirus Disease 2019 Vaccines, Renal Dialysis
- Keywords
- Seroepidemiologic Studies, Renal Dialysis, Coronavirus disease 2019 Vaccines
What is being measured
The primary outcome is the main question the study is designed to answer.
Estimate the proportion of hemodialysis patients who present events supposedly attributed to vaccines and immunizations after having received a Coronavirus disease 2019 vaccine
Estimate the proportion of hemodialysis patients who present events supposedly attributed to vaccines and immunizations after having received a Coronavirus disease 2019 vaccine
Measured: one year
To assess the change in the levels of Immunoglobulin G (IgG) antibodies from baseline at 21 days, at 40 days and at 120 days after immunization
To assess the change in the levels of Immunoglobulin G (IgG) antibodies from baseline at 21 days, at 40 days and at 120 days after immunization
Measured: one year
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted29 Jun 2021
- Study start9 Apr 2021
- Primary completion4 Aug 2022
- Study completion4 Aug 2022
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (10)Papers the sponsor has linked to this study.
- Other trials for Coronavirus Disease 2019 VaccinesStudies 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
- Cohort
- Time perspective
- Prospective
- Enrolment
- 950 participants (actual)
Sponsor and investigators
- Lead sponsor
- Hospital Italiano de Buenos Aires
- Sponsor type
- University, hospital or other
- Collaborators
- Ministerio de Salud de Ciudad Autónoma de Buenos Aires, University of Buenos Aires
- Responsible party
- Principal investigator, GUILLERMO JAVIER ROSA DIEZ, Hospital Italiano de Buenos Aires
- Investigators
- Guillermo IP Rosa Diez, MD, Principal investigator, Hospital Italiano de Buenos AiresJorge SI Geffner, Study chair, University of Buenos AiresFernando SI Lombi, Study chair, Sociedad Argentina de NefrologíaMarina SI Papaginovic, Study chair, Sociedad Argentina de NefrologíaRicardo SI Heguilen, Study chair, Sociedad Argentina de NefrologíaLuciana Fernandez SI Paganti, Study chair, Sociedad Argentina de NefrologíaSoledad SI Crucelegui, Study chair, Hospital Italiano de Buenos AiresVanina SI Pagotto, Study chair, Hospital Italiano de Buenos Aires
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04944433
- Sponsor's protocol ID
- 7412
- Status last verified
- Aug 2022
- First submitted
- 18 Jun 2021
- Last updated
- 5 Aug 2022
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Undecided
Publications
Logunov DY, Dolzhikova IV, Zubkova OV, Tukhvatullin AI, Shcheblyakov DV, Dzharullaeva AS, Grousova DM, Erokhova AS, Kovyrshina AV, Botikov AG, Izhaeva FM, Popova O, Ozharovskaya TA, Esmagambetov IB, Favorskaya IA, Zrelkin DI, Voronina DV, Shcherbinin DN, Semikhin AS, Simakova YV, Tokarskaya EA, Lubenets NL, Egorova DA, Shmarov MM, Nikitenko NA, Morozova LF, Smolyarchuk EA, Kryukov EV, Babira VF, Borisevich SV, Naroditsky BS, Gintsburg AL. Safety and immunogenicity of an rAd26 and rAd5 vector-based heterologous prime-boost COVID-19 vaccine in two formulations: two open, non-randomised phase 1/2 studies from Russia. Lancet. 2020 Sep 26;396(10255):887-897. doi: 10.1016/S0140-6736(20)31866-3. Epub 2020 Sep 4.
PubMed 32896291Logunov DY, Dolzhikova IV, Shcheblyakov DV, Tukhvatulin AI, Zubkova OV, Dzharullaeva AS, Kovyrshina AV, Lubenets NL, Grousova DM, Erokhova AS, Botikov AG, Izhaeva FM, Popova O, Ozharovskaya TA, Esmagambetov IB, Favorskaya IA, Zrelkin DI, Voronina DV, Shcherbinin DN, Semikhin AS, Simakova YV, Tokarskaya EA, Egorova DA, Shmarov MM, Nikitenko NA, Gushchin VA, Smolyarchuk EA, Zyryanov SK, Borisevich SV, Naroditsky BS, Gintsburg AL; Gam-COVID-Vac Vaccine Trial Group. Safety and efficacy of an rAd26 and rAd5 vector-based heterologous prime-boost COVID-19 vaccine: an interim analysis of a randomised controlled phase 3 trial in Russia. Lancet. 2021 Feb 20;397(10275):671-681. doi: 10.1016/S0140-6736(21)00234-8. Epub 2021 Feb 2.
PubMed 33545094Voysey M, Clemens SAC, Madhi SA, Weckx LY, Folegatti PM, Aley PK, Angus B, Baillie VL, Barnabas SL, Bhorat QE, Bibi S, Briner C, Cicconi P, Collins AM, Colin-Jones R, Cutland CL, Darton TC, Dheda K, Duncan CJA, Emary KRW, Ewer KJ, Fairlie L, Faust SN, Feng S, Ferreira DM, Finn A, Goodman AL, Green CM, Green CA, Heath PT, Hill C, Hill H, Hirsch I, Hodgson SHC, Izu A, Jackson S, Jenkin D, Joe CCD, Kerridge S, Koen A, Kwatra G, Lazarus R, Lawrie AM, Lelliott A, Libri V, Lillie PJ, Mallory R, Mendes AVA, Milan EP, Minassian AM, McGregor A, Morrison H, Mujadidi YF, Nana A, O'Reilly PJ, Padayachee SD, Pittella A, Plested E, Pollock KM, Ramasamy MN, Rhead S, Schwarzbold AV, Singh N, Smith A, Song R, Snape MD, Sprinz E, Sutherland RK, Tarrant R, Thomson EC, Torok ME, Toshner M, Turner DPJ, Vekemans J, Villafana TL, Watson MEE, Williams CJ, Douglas AD, Hill AVS, Lambe T, Gilbert SC, Pollard AJ; Oxford COVID Vaccine Trial Group. Safety and efficacy of the ChAdOx1 nCoV-19 vaccine (AZD1222) against SARS-CoV-2: an interim analysis of four randomised controlled trials in Brazil, South Africa, and the UK. Lancet. 2021 Jan 9;397(10269):99-111. doi: 10.1016/S0140-6736(20)32661-1. Epub 2020 Dec 8.
PubMed 33306989Di Pasquale A, Bonanni P, Garcon N, Stanberry LR, El-Hodhod M, Tavares Da Silva F. Vaccine safety evaluation: Practical aspects in assessing benefits and risks. Vaccine. 2016 Dec 20;34(52):6672-6680. doi: 10.1016/j.vaccine.2016.10.039. Epub 2016 Nov 8.
PubMed 27836435Herve C, Laupeze B, Del Giudice G, Didierlaurent AM, Tavares Da Silva F. The how's and what's of vaccine reactogenicity. NPJ Vaccines. 2019 Sep 24;4:39. doi: 10.1038/s41541-019-0132-6. eCollection 2019.
PubMed 31583123Mitchell TC, Casella CR. No pain no gain? Adjuvant effects of alum and monophosphoryl lipid A in pertussis and HPV vaccines. Curr Opin Immunol. 2017 Aug;47:17-25. doi: 10.1016/j.coi.2017.06.009. Epub 2017 Jul 17.
PubMed 28728074Windpessl M, Bruchfeld A, Anders HJ, Kramer H, Waldman M, Renia L, Ng LFP, Xing Z, Kronbichler A. COVID-19 vaccines and kidney disease. Nat Rev Nephrol. 2021 May;17(5):291-293. doi: 10.1038/s41581-021-00406-6. Epub 2021 Feb 8.
PubMed 33558753Heldman MR, Limaye AP. SARS-CoV-2 Vaccines in Kidney Transplant Recipients: Will They Be Safe and Effective and How Will We Know? J Am Soc Nephrol. 2021 May 3;32(5):1021-1024. doi: 10.1681/ASN.2021010023. Epub 2021 Mar 24. No abstract available.
PubMed 33762353Scharpe J, Evenepoel P, Maes B, Bammens B, Claes K, Osterhaus AD, Vanrenterghem Y, Peetermans WE. Influenza vaccination is efficacious and safe in renal transplant recipients. Am J Transplant. 2008 Feb;8(2):332-7. doi: 10.1111/j.1600-6143.2007.02066.x. Epub 2007 Dec 19.
PubMed 18162092Labriola L, Scohy A, Seghers F, Perlot Q, De Greef J, Desmet C, Romain C, Morelle J, Yombi JC, Kabamba B, Rodriguez-Villalobos H, Jadoul M. A Longitudinal, 3-Month Serologic Assessment of SARS-CoV-2 Infections in a Belgian Hemodialysis Facility. Clin J Am Soc Nephrol. 2021 Apr 7;16(4):613-614. doi: 10.2215/CJN.12490720. Epub 2020 Nov 18. No abstract available.
PubMed 33208402
Study at a glance
From the registry record, last updated by the sponsor on 5 Aug 2022. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Safety and Efficacy of the Coronavirus Disease 2019 Vaccine in Hemodialysis Patients
- ClinicalTrials.gov ID
- NCT04944433
- Acronym / sponsor ID
- 7412
- Conditions
- Coronavirus Disease 2019 Vaccines, Renal Dialysis
- Keywords
- Seroepidemiologic Studies, Renal Dialysis, Coronavirus disease 2019 Vaccines
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 950 participants (actual)
- Lead sponsor
- Hospital Italiano de Buenos AiresUniversity, hospital or other
- Collaborators
- Ministerio de Salud de Ciudad Autónoma de Buenos Aires, University of Buenos Aires
- Study start
- 9 Apr 2021 (actual)
- Primary completion
- 4 Aug 2022 (actual)
- Study completion
- 4 Aug 2022 (actual)
- First posted
- 29 Jun 2021 (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.
It is unknown whether Coronavirus disease 2019 vaccines confer the same high level of protection in patients with kidney disease as reported for participants in recent trials, who were generally healthy. Objectives: To evaluate the safety and efficacy of Coronavirus disease 2019 vaccines in hemodialysis patients.
Detailed description
Given the vulnerability of people with chronic kidney disease to Coronavirus 2019 , leading nephrology societies such as the National Kidney Federation and the American Kidney Foundation have issued statements calling for prioritization of these patients for vaccination. It is unknown whether Coronavirus disease 2019 vaccines confer the same high level of protection in patients with kidney disease as reported for participants in recent trials, who were generally healthy.
Objectives:
- Estimate the proportion of hemodialysis patients who present events supposedly attributed to vaccines and immunizations after having received a Coronavirus disease 2019 vaccine
- Determine the levels of Immunoglobulin G antibodies in patients who received a Coronavirus disease 2019vaccine between the time before the first dose, at 21 days, at 40 days and at 120 days after immunization.
Methods Design: Multicenter, observational and analytical study of a prospective cohort of hemodialysis patients 18 years and older who received immunization with a Coronavirus disease 2019 vaccine in the Autonomous City of Buenos Aires in a vaccination plan.
Analysis The proportion of patients with Adverse events presumably attributable to vaccination and immunization will be estimated with its 95% confidence interval. The immunoglobulin G titer for coronavirus type 2 causing severe acute respiratory syndrome will be compared using Generalized Estimating Equations models.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Age groups
- Adult, Older adult
- Study population
- Hemodialysis patients in an immunization plan with a COVID-19 vaccine from the hemodialysis centers of the Autonomous City of Buenos Aires
Key inclusion criteria (1 listed)
- Patients over 18 years of age on hemodialysis in an immunization plan with a Coronavirus disease 2019 vaccine.
Key exclusion criteria (1 listed)
- Contraindication to receive the vaccine.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Estimate the proportion of hemodialysis patients who present events supposedly attributed to vaccines and immunizations after having received a Coronavirus disease 2019 vaccine
Time frame: one year
Estimate the proportion of hemodialysis patients who present events supposedly attributed to vaccines and immunizations after having received a Coronavirus disease 2019 vaccine
To assess the change in the levels of Immunoglobulin G (IgG) antibodies from baseline at 21 days, at 40 days and at 120 days after immunization
Time frame: one year
To assess the change in the levels of Immunoglobulin G (IgG) antibodies from baseline at 21 days, at 40 days and at 120 days after immunization
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 5 Aug 2022.
- Results publication: PubMed 32896291Logunov DY, Dolzhikova IV, Zubkova OV, Tukhvatullin AI, Shcheblyakov DV, Dzharullaeva AS, Grousova DM, Erokhova AS, Kovyrshina AV, Botikov AG, Izhaeva FM, Popova O, Ozharovskaya TA, Esmagambetov IB, Favorskaya IA, Zrelkin DI, Voronina DV, Shcherbinin DN, Semikhin AS, Simakova YV, Tokarskaya EA, Lubenets NL, Egorova DA, Shmarov MM, Nikitenko NA, Morozova LF, Smolyarchuk EA, Kryukov EV, Babira VF, Borisevich SV, Naroditsky BS, Gintsburg AL. Safety and immunogenicity of an rAd26 and rAd5 vector-based heterologous prime-boost COVID-19 vaccine in two formulations: two open, non-randomised phase 1/2 studies from Russia. Lancet. 2020 Sep 26;396(10255):887-897. doi: 10.1016/S0140-6736(20)31866-3. Epub 2020 Sep 4.
- Results publication: PubMed 33545094Logunov DY, Dolzhikova IV, Shcheblyakov DV, Tukhvatulin AI, Zubkova OV, Dzharullaeva AS, Kovyrshina AV, Lubenets NL, Grousova DM, Erokhova AS, Botikov AG, Izhaeva FM, Popova O, Ozharovskaya TA, Esmagambetov IB, Favorskaya IA, Zrelkin DI, Voronina DV, Shcherbinin DN, Semikhin AS, Simakova YV, Tokarskaya EA, Egorova DA, Shmarov MM, Nikitenko NA, Gushchin VA, Smolyarchuk EA, Zyryanov SK, Borisevich SV, Naroditsky BS, Gintsburg AL; Gam-COVID-Vac Vaccine Trial Group. Safety and efficacy of an rAd26 and rAd5 vector-based heterologous prime-boost COVID-19 vaccine: an interim analysis of a randomised controlled phase 3 trial in Russia. Lancet. 2021 Feb 20;397(10275):671-681. doi: 10.1016/S0140-6736(21)00234-8. Epub 2021 Feb 2.
- Results publication: PubMed 33306989Voysey M, Clemens SAC, Madhi SA, Weckx LY, Folegatti PM, Aley PK, Angus B, Baillie VL, Barnabas SL, Bhorat QE, Bibi S, Briner C, Cicconi P, Collins AM, Colin-Jones R, Cutland CL, Darton TC, Dheda K, Duncan CJA, Emary KRW, Ewer KJ, Fairlie L, Faust SN, Feng S, Ferreira DM, Finn A, Goodman AL, Green CM, Green CA, Heath PT, Hill C, Hill H, Hirsch I, Hodgson SHC, Izu A, Jackson S, Jenkin D, Joe CCD, Kerridge S, Koen A, Kwatra G, Lazarus R, Lawrie AM, Lelliott A, Libri V, Lillie PJ, Mallory R, Mendes AVA, Milan EP, Minassian AM, McGregor A, Morrison H, Mujadidi YF, Nana A, O'Reilly PJ, Padayachee SD, Pittella A, Plested E, Pollock KM, Ramasamy MN, Rhead S, Schwarzbold AV, Singh N, Smith A, Song R, Snape MD, Sprinz E, Sutherland RK, Tarrant R, Thomson EC, Torok ME, Toshner M, Turner DPJ, Vekemans J, Villafana TL, Watson MEE, Williams CJ, Douglas AD, Hill AVS, Lambe T, Gilbert SC, Pollard AJ; Oxford COVID Vaccine Trial Group. Safety and efficacy of the ChAdOx1 nCoV-19 vaccine (AZD1222) against SARS-CoV-2: an interim analysis of four randomised controlled trials in Brazil, South Africa, and the UK. Lancet. 2021 Jan 9;397(10269):99-111. doi: 10.1016/S0140-6736(20)32661-1. Epub 2020 Dec 8.
- Results publication: PubMed 27836435Di Pasquale A, Bonanni P, Garcon N, Stanberry LR, El-Hodhod M, Tavares Da Silva F. Vaccine safety evaluation: Practical aspects in assessing benefits and risks. Vaccine. 2016 Dec 20;34(52):6672-6680. doi: 10.1016/j.vaccine.2016.10.039. Epub 2016 Nov 8.
- Results publication: PubMed 31583123Herve C, Laupeze B, Del Giudice G, Didierlaurent AM, Tavares Da Silva F. The how's and what's of vaccine reactogenicity. NPJ Vaccines. 2019 Sep 24;4:39. doi: 10.1038/s41541-019-0132-6. eCollection 2019.
- Results publication: PubMed 28728074Mitchell TC, Casella CR. No pain no gain? Adjuvant effects of alum and monophosphoryl lipid A in pertussis and HPV vaccines. Curr Opin Immunol. 2017 Aug;47:17-25. doi: 10.1016/j.coi.2017.06.009. Epub 2017 Jul 17.
- Results publication: PubMed 33558753Windpessl M, Bruchfeld A, Anders HJ, Kramer H, Waldman M, Renia L, Ng LFP, Xing Z, Kronbichler A. COVID-19 vaccines and kidney disease. Nat Rev Nephrol. 2021 May;17(5):291-293. doi: 10.1038/s41581-021-00406-6. Epub 2021 Feb 8.
- Results publication: PubMed 33762353Heldman MR, Limaye AP. SARS-CoV-2 Vaccines in Kidney Transplant Recipients: Will They Be Safe and Effective and How Will We Know? J Am Soc Nephrol. 2021 May 3;32(5):1021-1024. doi: 10.1681/ASN.2021010023. Epub 2021 Mar 24. No abstract available.
- Results publication: PubMed 18162092Scharpe J, Evenepoel P, Maes B, Bammens B, Claes K, Osterhaus AD, Vanrenterghem Y, Peetermans WE. Influenza vaccination is efficacious and safe in renal transplant recipients. Am J Transplant. 2008 Feb;8(2):332-7. doi: 10.1111/j.1600-6143.2007.02066.x. Epub 2007 Dec 19.
- Results publication: PubMed 33208402Labriola L, Scohy A, Seghers F, Perlot Q, De Greef J, Desmet C, Romain C, Morelle J, Yombi JC, Kabamba B, Rodriguez-Villalobos H, Jadoul M. A Longitudinal, 3-Month Serologic Assessment of SARS-CoV-2 Infections in a Belgian Hemodialysis Facility. Clin J Am Soc Nephrol. 2021 Apr 7;16(4):613-614. doi: 10.2215/CJN.12490720. Epub 2020 Nov 18. No abstract available.
- World Health Organization.Coronavirus disease 2019 vaccines.Link provided by the sponsor.
- Bank of Communication Resources of the Ministry of Health of the Nation. Fifth Vaccine Safety Report. 2021. ArgentinaLink provided by the sponsor.
- Emergency registration of the product "Coronavirus disease 2019 Vaccine AstraZeneca". 2020. ArgentinaLink provided by the sponsor.
- Ministry of Health, Argentina. Strategic Plan for vaccination against Coronavirus disease 2019 in Argentina 2020Link provided by the sponsor.
- Ministry of Health, Argentina. Integrated Argentine Health Information System. 2020.Link provided by the sponsor.
- Individual participant dataSharing planned: Undecided
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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.
Guillermo IP Rosa Diez, MD principal investigator
Hospital Italiano de Buenos Aires
Jorge SI Geffner study chair
University of Buenos Aires
Fernando SI Lombi study chair
Sociedad Argentina de Nefrología
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 Coronavirus Disease 2019 Vaccines and Renal Dialysis, run by Hospital Italiano de Buenos Aires at 1 site in Argentina.
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 1 inclusion and 1 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 5 Aug 2022. 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 Argentina. 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?
Estimate the proportion of hemodialysis patients who present events supposedly attributed to vaccines and immunizations after having received a Coronavirus disease 2019 vaccine (time frame: one year). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT04944433, which also lists 10 linked publications.
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 5 Aug 2022; AzTrials last refreshed its copy on 8 Nov 2026.