Atrial FibrillationAFTER-2NCT02354456
Atrial Fibrillation in Turkey: Epidemiologic Registry-2
An observational study of Atrial Fibrillation, run by Dicle University at 1 site in Turkey (Türkiye).
Trial summary
Atrial fibrillation (AF) is one of the most common cause of preventable ischemic stroke and associated with increased cardiovascular morbidity and mortality. Our previous AFTER study demonstrated the general epidemiological data about the patients with valvular and nonvalvular AF in Turkey. Read more about this study
- Who is it for?
- Ages 18 to 95 years
- Conditions the study is for
- Atrial Fibrillation
- How many people
- 4,100 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- Jan 2015to Jul 2016
- How long will I take part?
- 1 Year
- 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 to 95 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: nonvalvular atrial fibrillation
Who may be able to join
- All consecutive adult non-valvular AF patients applied to the cardiology clinics with at least one attack of AF identified on electrocardiography without rheumatic mitral valve stenosis and prosthetic valve disease
Who cannot join
- Patients who will refuse to be a participant or will not sign the consent form
Trial locations and contacts
1 site in 1 country.
Turkey (Türkiye)1 site, 1 recruiting
- Recruiting
Dicle Üniversity School of Medicine
Diyarbakır, 21280
Abdulkadir Yildiz, Ass. Prof., 00905052360548, drakadiryildiz@gmail.com
About this study
Official title: An Epidemiological Study to Evaluate the Use of Vitamin K Antagonists and New Oral Anticoagulants Among Nonvalvular Atrial Fibrillation Patients in Turkey
Atrial fibrillation (AF) is one of the most common cause of preventable ischemic stroke and associated with increased cardiovascular morbidity and mortality. Our previous AFTER study demonstrated the general epidemiological data about the patients with valvular and nonvalvular AF in Turkey. However, data is lacking about the use of new oral anticoagulants (NOACs), time in therapeutic INR range (TTR) in vitamin K antagonist users and AF management modality in our country. In this multicenter trial the investigators aimed to analyze, follow and evaluate the epidemiological data in non-valvular AF patients.
Read the detailed description
Atrial fibrillation (AF) is the most common cause of preventable stroke and strongly associated with increased cardiovascular morbidity and mortality with a prevalence of 1-2% in general population.The first multicenter trial in AF patients in our country, Atrial Fibrillation in Turkey: Epidemiologic Registry (AFTER) study, showed that 40% of non-valvular AF patients were on warfarin therapy with an effective INR rate of 37% and the most frequent cause of warfarin underuse was physician neglect. Yet, the use of new oral anticoagulants, time in therapeutic INR range (TTR) in warfarin users and the main management modality (rhythm or rate control) in AF patients have not been studied in Turkey. Therefore, in this multicenter trial, we aimed to assess the extent of effective anticoagulant use (by means of TTR) and epidemiological characteristics of the nonvalvular AF patients with the use of new oral anticoagulants (NOACs) in clinical practice in addition to increased awareness provided by AFTER study.
AFTER-2 study is planned as a prospective, observational and multicenter study with a 6 month and 1-year follow-up of the patients. A total of 4100 patients in 42 centers reflecting the population of the twelve regions of our country according to the Nomenclature of Territorial Units for Statistics will be included in the study.
The detailed characteristics of the patients with non-valvular AF, the rates and kind of oral anticoagulant use, the effect of increased awareness and NOACs on anticoagulant use rate, TTR in warfarin using patients and the bleeding risks of the patients will be determined in this study. At the end of the study, we will question the patients in terms of major adverse events and analyze the independent predictors of these events.
- Conditions
- Atrial Fibrillation
- Keywords
- atrial fibrillation, epidemiology, antiocaogulation
- Medical subject headings
- Atrial Fibrillation
What is being measured
The primary outcome is the main question the study is designed to answer.
Number of dead patients
Measured: 1 year
Number of patients with stroke
Measured: 1 year
Number of patients with major haemorrhage
Measured: 1 year
Number of hospitalization
Measured: 1 year
Secondary outcomes (1)
Number of patients with time in therapeutic INR range
Time in therapeutic INR range calculated according to Rosendaal method
Measured: 1 year
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted3 Feb 2015 (estimated)
- Study startJan 2015
- Primary completionJan 2016 (estimated)
- Study completionJul 2016 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (5)Papers the sponsor has linked to this study.
- Other trials for Atrial FibrillationStudies 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
- Case only
- Time perspective
- Prospective
- Enrolment
- 4,100 participants (estimated)
- Target duration
- 1 Year
Sponsor and investigators
- Lead sponsor
- Dicle University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Hasan Kaya, Dicle University
- Investigators
- Faruk Ertas, Assoc. Prof., Principal investigator, Dicle University School of Medicine
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02354456
- Sponsor's protocol ID
- DicleU
- Acronym
- AFTER-2
- Status last verified
- Jan 2016
- First submitted
- 26 Jan 2015
- Last updated
- 21 Jan 2016
- Results posted
- No
- Data monitoring committee
- No
Publications
Kaya H, Ertas F, Kaya Z, Kahya Eren N, Yuksel M, Koroglu B, Kose N, Yildiz A, Cimen T, Ulgen MS. Epidemiology, anticoagulant treatment and risk of thromboembolism in patients with valvular atrial fibrillation: Results from Atrial Fibrillation in Turkey: Epidemiologic Registry (AFTER). Cardiol J. 2014;21(2):158-62. doi: 10.5603/CJ.a2013.0085. Epub 2013 Jun 25.
PubMed 23799558Ertas F, Eren NK, Kaya H, Aribas A, Acar G, Kanadasi M, Gedik S, Oylumlu M, Yuksel M, Ulgen MS; AFTER Investigators. The atrial fibrillation in Turkey: Epidemiologic Registry (AFTER). Cardiol J. 2013;20(4):447-52. doi: 10.5603/CJ.a2013.0055. Epub 2013 May 15.
PubMed 23677730Connolly SJ, Wallentin L, Ezekowitz MD, Eikelboom J, Oldgren J, Reilly PA, Brueckmann M, Pogue J, Alings M, Amerena JV, Avezum A, Baumgartner I, Budaj AJ, Chen JH, Dans AL, Darius H, Di Pasquale G, Ferreira J, Flaker GC, Flather MD, Franzosi MG, Golitsyn SP, Halon DA, Heidbuchel H, Hohnloser SH, Huber K, Jansky P, Kamensky G, Keltai M, Kim SS, Lau CP, Le Heuzey JY, Lewis BS, Liu L, Nanas J, Omar R, Pais P, Pedersen KE, Piegas LS, Raev D, Smith PJ, Talajic M, Tan RS, Tanomsup S, Toivonen L, Vinereanu D, Xavier D, Zhu J, Wang SQ, Duffy CO, Themeles E, Yusuf S. The Long-Term Multicenter Observational Study of Dabigatran Treatment in Patients With Atrial Fibrillation (RELY-ABLE) Study. Circulation. 2013 Jul 16;128(3):237-43. doi: 10.1161/CIRCULATIONAHA.112.001139. Epub 2013 Jun 14.
PubMed 23770747Yamashita T, Inoue H, Okumura K, Atarashi H, Origasa H; J-RHYTHM Registry Investigators. Warfarin anticoagulation intensity in Japanese nonvalvular atrial fibrillation patients: a J-RHYTHM Registry analysis. J Cardiol. 2015 Mar;65(3):175-7. doi: 10.1016/j.jjcc.2014.07.013. Epub 2014 Aug 26.
PubMed 25169015Ertas F, Kaya H, Yildiz A, Davutoglu V, Kiris A, Dinc L, Kafes H, Avci A, Calapkorur B, Ertas G, Gul M, Kahraman Ay N, Bulur S, Durukan M, Eren M, Ilhan I, Kucuk M, Ozpelit E, Simsek H, Ucar FM, Yildiz A, Sahin DY, Ayhan E, Caglayan CE, Gungor H, Ozyurtlu F, Sen N, Vatan B, Vatansever F, Kobat MA, Temiz A, Taylan G, Donmez I, Erkus ME, Soylemez S, Zengin H, Gunduz M, Tuncez A, Karavelioglu Y, Gokdeniz T, Koza Y, Aktop Z, Katlandur H, Karaca Ozer P, Yuksel M, Acet H, Cil H, Alan S, Toprak N. An epidemiological study to evaluate the use of vitamin K antagonists and new oral anticoagulants among non-valvular atrial fibrillation patients in Turkey- AFTER-2 study design. Turk Kardiyol Dern Ars. 2015 Mar;43(2):169-77. doi: 10.5543/tkda.2015.35984.
PubMed 25782122
Study at a glance
From the registry record, last updated by the sponsor on 21 Jan 2016. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- An Epidemiological Study to Evaluate the Use of Vitamin K Antagonists and New Oral Anticoagulants Among Nonvalvular Atrial Fibrillation Patients in Turkey
- ClinicalTrials.gov ID
- NCT02354456
- Acronym / sponsor ID
- AFTER-2 / DicleU
- Conditions
- Atrial Fibrillation
- Keywords
- atrial fibrillation, epidemiology, antiocaogulation
- Study type
- Observational
- Recruitment status
- Unknown status
- Enrolment
- 4,100 participants (estimated)
- Lead sponsor
- Dicle UniversityUniversity, hospital or other
- Study start
- Jan 2015
- Primary completion
- Jan 2016 (estimated)
- Study completion
- Jul 2016 (estimated)
- First posted
- 3 Feb 2015 (estimated)
- 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.
Atrial fibrillation (AF) is one of the most common cause of preventable ischemic stroke and associated with increased cardiovascular morbidity and mortality. Our previous AFTER study demonstrated the general epidemiological data about the patients with valvular and nonvalvular AF in Turkey. However, data is lacking about the use of new oral anticoagulants (NOACs), time in therapeutic INR range (TTR) in vitamin K antagonist users and AF management modality in our country. In this multicenter trial the investigators aimed to analyze, follow and evaluate the epidemiological data in non-valvular AF patients.
Detailed description
Atrial fibrillation (AF) is the most common cause of preventable stroke and strongly associated with increased cardiovascular morbidity and mortality with a prevalence of 1-2% in general population.The first multicenter trial in AF patients in our country, Atrial Fibrillation in Turkey: Epidemiologic Registry (AFTER) study, showed that 40% of non-valvular AF patients were on warfarin therapy with an effective INR rate of 37% and the most frequent cause of warfarin underuse was physician neglect. Yet, the use of new oral anticoagulants, time in therapeutic INR range (TTR) in warfarin users and the main management modality (rhythm or rate control) in AF patients have not been studied in Turkey. Therefore, in this multicenter trial, we aimed to assess the extent of effective anticoagulant use (by means of TTR) and epidemiological characteristics of the nonvalvular AF patients with the use of new oral anticoagulants (NOACs) in clinical practice in addition to increased awareness provided by AFTER study.
AFTER-2 study is planned as a prospective, observational and multicenter study with a 6 month and 1-year follow-up of the patients. A total of 4100 patients in 42 centers reflecting the population of the twelve regions of our country according to the Nomenclature of Territorial Units for Statistics will be included in the study.
The detailed characteristics of the patients with non-valvular AF, the rates and kind of oral anticoagulant use, the effect of increased awareness and NOACs on anticoagulant use rate, TTR in warfarin using patients and the bleeding risks of the patients will be determined in this study. At the end of the study, we will question the patients in terms of major adverse events and analyze the independent predictors of these events.
Study design
- Observational model
- Case only
- Time perspective
- Prospective
- Target follow-up
- 1 Year
Who may qualify
- Ages
- 18 to 95 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- nonvalvular atrial fibrillation
Key inclusion criteria (1 listed)
- All consecutive adult non-valvular AF patients applied to the cardiology clinics with at least one attack of AF identified on electrocardiography without rheumatic mitral valve stenosis and prosthetic valve disease
Key exclusion criteria (1 listed)
- Patients who will refuse to be a participant or will not sign the consent form
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
Number of dead patients
Time frame: 1 year
Number of patients with stroke
Time frame: 1 year
Number of patients with major haemorrhage
Time frame: 1 year
Number of hospitalization
Time frame: 1 year
1 secondary outcome
Number of patients with time in therapeutic INR range
Time frame: 1 year
Results and safety
Results are not available in the source record.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 21 Jan 2016.
- Background: PubMed 23799558Kaya H, Ertas F, Kaya Z, Kahya Eren N, Yuksel M, Koroglu B, Kose N, Yildiz A, Cimen T, Ulgen MS. Epidemiology, anticoagulant treatment and risk of thromboembolism in patients with valvular atrial fibrillation: Results from Atrial Fibrillation in Turkey: Epidemiologic Registry (AFTER). Cardiol J. 2014;21(2):158-62. doi: 10.5603/CJ.a2013.0085. Epub 2013 Jun 25.
- Background: PubMed 23677730Ertas F, Eren NK, Kaya H, Aribas A, Acar G, Kanadasi M, Gedik S, Oylumlu M, Yuksel M, Ulgen MS; AFTER Investigators. The atrial fibrillation in Turkey: Epidemiologic Registry (AFTER). Cardiol J. 2013;20(4):447-52. doi: 10.5603/CJ.a2013.0055. Epub 2013 May 15.
- Background: PubMed 23770747Connolly SJ, Wallentin L, Ezekowitz MD, Eikelboom J, Oldgren J, Reilly PA, Brueckmann M, Pogue J, Alings M, Amerena JV, Avezum A, Baumgartner I, Budaj AJ, Chen JH, Dans AL, Darius H, Di Pasquale G, Ferreira J, Flaker GC, Flather MD, Franzosi MG, Golitsyn SP, Halon DA, Heidbuchel H, Hohnloser SH, Huber K, Jansky P, Kamensky G, Keltai M, Kim SS, Lau CP, Le Heuzey JY, Lewis BS, Liu L, Nanas J, Omar R, Pais P, Pedersen KE, Piegas LS, Raev D, Smith PJ, Talajic M, Tan RS, Tanomsup S, Toivonen L, Vinereanu D, Xavier D, Zhu J, Wang SQ, Duffy CO, Themeles E, Yusuf S. The Long-Term Multicenter Observational Study of Dabigatran Treatment in Patients With Atrial Fibrillation (RELY-ABLE) Study. Circulation. 2013 Jul 16;128(3):237-43. doi: 10.1161/CIRCULATIONAHA.112.001139. Epub 2013 Jun 14.
- Background: PubMed 25169015Yamashita T, Inoue H, Okumura K, Atarashi H, Origasa H; J-RHYTHM Registry Investigators. Warfarin anticoagulation intensity in Japanese nonvalvular atrial fibrillation patients: a J-RHYTHM Registry analysis. J Cardiol. 2015 Mar;65(3):175-7. doi: 10.1016/j.jjcc.2014.07.013. Epub 2014 Aug 26.
- Derived from this study: PubMed 25782122Ertas F, Kaya H, Yildiz A, Davutoglu V, Kiris A, Dinc L, Kafes H, Avci A, Calapkorur B, Ertas G, Gul M, Kahraman Ay N, Bulur S, Durukan M, Eren M, Ilhan I, Kucuk M, Ozpelit E, Simsek H, Ucar FM, Yildiz A, Sahin DY, Ayhan E, Caglayan CE, Gungor H, Ozyurtlu F, Sen N, Vatan B, Vatansever F, Kobat MA, Temiz A, Taylan G, Donmez I, Erkus ME, Soylemez S, Zengin H, Gunduz M, Tuncez A, Karavelioglu Y, Gokdeniz T, Koza Y, Aktop Z, Katlandur H, Karaca Ozer P, Yuksel M, Acet H, Cil H, Alan S, Toprak N. An epidemiological study to evaluate the use of vitamin K antagonists and new oral anticoagulants among non-valvular atrial fibrillation patients in Turkey- AFTER-2 study design. Turk Kardiyol Dern Ars. 2015 Mar;43(2):169-77. doi: 10.5543/tkda.2015.35984.
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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.
Faruk Ertas, Assoc. Prof. principal investigator
Dicle University School of Medicine
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 Atrial Fibrillation, run by Dicle University 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 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: status not confirmed, as of the sponsor's last update on 21 Jan 2016. 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?
Results are not available in the source record.
How can a doctor refer a patient or contact the research team?
Contact Faruk Ertas, Assoc. Prof. (00904122488001 ext. 1126, farukertas@hotmail.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Number of dead patients (time frame: 1 year). The study lists 4 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 NCT02354456, which also lists 5 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 21 Jan 2016.