Venous ThromboembolismNCT03799016
An Observational Study on Incidence, Natural History and Treatment Patterns of Venous Thromboembolism in Taiwan
An observational study of Venous Thromboembolism, run by Bayer at 1 site in Taiwan.
Trial summary
The research question addressed by this study is primarily on the clinical epidemiology of VTE in Taiwan. The study aims to estimate the incidence of VTE and describe natural history of VTE, including long term clinical outcomes in adult Taiwanese population, utilizing population-based electronic health data in Taiwan. Read more about this study
- Who is it for?
- Ages 20 years and older
- Conditions the study is for
- Venous Thromboembolism
- How many people
- 104,215 participants
- Where
- 1 siteTaiwan
- Study dates
- 15 Dec 2016to 1 Jul 2017
- 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 20 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- The source population was the adult population in Taiwan. The legal age for definition as an adult (without additional research ethics review requirement) in Taiwan is 20; therefore all National Health Insurance (NHI) enrollees age 20 or older at any time during the study period were evaluated for VTE.
Who cannot join
- Person-time before an eligible subject turned 20 were not evaluated.
- Study subjects having inconsistent data on gender and unrealistic date of birth (birth year before 1890 and after 2015) were identified and excluded from the analysis.
Trial locations and contacts
1 site in 1 country.
About this study
The research question addressed by this study is primarily on the clinical epidemiology of VTE in Taiwan. The study aims to estimate the incidence of VTE and describe natural history of VTE, including long term clinical outcomes in adult Taiwanese population, utilizing population-based electronic health data in Taiwan.
- Conditions
- Venous Thromboembolism
- Medical subject headings
- Venous Thromboembolism
What is being measured
The primary outcome is the main question the study is designed to answer.
Incident VTE
Incident VTE cases were those who had a first VTE diagnosis after 1 January 2005 and with at least 5 years of look-back period. Those with a first VTE diagnosis less than 5 years of look-period were considered as undetermined VTE cases.
Measured: 4 years
Potential risk factors that occurred before the incident VTE events
Events during the 3 months before the first VTE recurrence will be described. Potential risk factors that will be evaluated include age, gender, and treatment regimen for VTE, adherence to treatment regimen, concomitant medications, and comorbidity. The analysis will be stratified by the nature of the first VTE (provoked and unprovoked). Due to the unknown number of repeated recurrence and complex clinical nature of patients with multiple VTE recurrence, risk factors for multiple recurrences will be evaluated at a less detailed level than that for the first recurrence.
Measured: 4 years
Usage patterns of anticoagulants among incident VTE patients were evaluated during incident VTE hospital admission and after discharge
Measured: 4 years
All-cause mortality
All deaths before 31 December 2014 among the incident VTE patients were identified through the mortality records. Patients were followed from incident VTE index date, and the patients were censored on 31 December 2014 or termination of NHI coverage without further medical or mortality records. If the patient died during the same hospitalization during the incident VTE, the death date was defined as the discharge date of that specific hospitalization.
Measured: 4 years
Major bleeding
Major bleeding (intracranial bleed and gastrointestinal bleed) was the major morbidity of interest and incident VTE patients were followed from incident VTE index date till 31 December 2014, death or termination of NHI coverage without any further medical records. Patients died during the incident VTE hospitalization were excluded for major bleeding follow up.
Measured: 4 years
Recurrent VTE
Recurrent VTE events after the incident VTE diagnosis were evaluated during the follow-up period through 31 December 2014 or until the patient died or NHI coverage terminated without any further medical records after the termination. The same VTE operational definitions according to different algorithm in incident VTE were consistently applied in recurrent VTE.
Measured: 4 years
Adherence of oral anticoagulant treatment was also evaluated with the calculation of MPR within 6 months and 12 months after discharge.
Measured: Up to 6 and 12 month
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted10 Jan 2019
- Study start15 Dec 2016
- Primary completion1 Jul 2017
- Study completion1 Jul 2017
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Venous ThromboembolismStudies of the same condition, open and under way.
- More trials run by BayerThe sponsor's other registered studies.
- 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
- Retrospective
- Enrolment
- 104,215 participants (actual)
Sponsor and investigators
- Lead sponsor
- Bayer
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
- Investigators
- Bayer Study Director, Study director, Bayer
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03799016
- Sponsor's protocol ID
- 18787
- Status last verified
- Jan 2019
- First submitted
- 25 Oct 2018
- Last updated
- 10 Jan 2019
- Results posted
- No
- Data monitoring committee
- No
Study at a glance
From the registry record, last updated by the sponsor on 10 Jan 2019. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- An Observational Study on Incidence, Natural History and Treatment Patterns of Venous Thromboembolism in Taiwan
- ClinicalTrials.gov ID
- NCT03799016
- Acronym / sponsor ID
- 18787
- Conditions
- Venous Thromboembolism
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 104,215 participants (actual)
- Lead sponsor
- BayerIndustry (pharma, biotech, devices)
- Study start
- 15 Dec 2016 (actual)
- Primary completion
- 1 Jul 2017 (actual)
- Study completion
- 1 Jul 2017 (actual)
- First posted
- 10 Jan 2019 (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 research question addressed by this study is primarily on the clinical epidemiology of VTE in Taiwan. The study aims to estimate the incidence of VTE and describe natural history of VTE, including long term clinical outcomes in adult Taiwanese population, utilizing population-based electronic health data in Taiwan.
Study design
- Observational model
- Cohort
- Time perspective
- Retrospective
Who may qualify
- Ages
- 20 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
- The source population was the adult population in Taiwan. The legal age for definition as an adult (without additional research ethics review requirement) in Taiwan is 20; therefore all National Health Insurance (NHI) enrollees age 20 or older at any time during the study period were evaluated for VTE.
Key exclusion criteria (2 listed)
- Person-time before an eligible subject turned 20 were not evaluated.
- Study subjects having inconsistent data on gender and unrealistic date of birth (birth year before 1890 and after 2015) were identified and excluded from the analysis.
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
Incident VTE
Time frame: 4 years
Incident VTE cases were those who had a first VTE diagnosis after 1 January 2005 and with at least 5 years of look-back period. Those with a first VTE diagnosis less than 5 years of look-period were considered as undetermined VTE cases.
Potential risk factors that occurred before the incident VTE events
Time frame: 4 years
Events during the 3 months before the first VTE recurrence will be described. Potential risk factors that will be evaluated include age, gender, and treatment regimen for VTE, adherence to treatment regimen, concomitant medications, and comorbidity. The analysis will be stratified by the nature of the first VTE (provoked and unprovoked). Due to the unknown number of repeated recurrence and complex clinical nature of patients with multiple VTE recurrence, risk factors for multiple recurrences will be evaluated at a less detailed level than that for the first recurrence.
Usage patterns of anticoagulants among incident VTE patients were evaluated during incident VTE hospital admission and after discharge
Time frame: 4 years
All-cause mortality
Time frame: 4 years
All deaths before 31 December 2014 among the incident VTE patients were identified through the mortality records. Patients were followed from incident VTE index date, and the patients were censored on 31 December 2014 or termination of NHI coverage without further medical or mortality records. If the patient died during the same hospitalization during the incident VTE, the death date was defined as the discharge date of that specific hospitalization.
Major bleeding
Time frame: 4 years
Major bleeding (intracranial bleed and gastrointestinal bleed) was the major morbidity of interest and incident VTE patients were followed from incident VTE index date till 31 December 2014, death or termination of NHI coverage without any further medical records. Patients died during the incident VTE hospitalization were excluded for major bleeding follow up.
Recurrent VTE
Time frame: 4 years
Recurrent VTE events after the incident VTE diagnosis were evaluated during the follow-up period through 31 December 2014 or until the patient died or NHI coverage terminated without any further medical records after the termination. The same VTE operational definitions according to different algorithm in incident VTE were consistently applied in recurrent VTE.
Adherence of oral anticoagulant treatment was also evaluated with the calculation of MPR within 6 months and 12 months after discharge.
Time frame: Up to 6 and 12 month
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 10 Jan 2019.
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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.
Bayer Study Director study director
Bayer
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 Venous Thromboembolism, run by Bayer at 1 site in Taiwan.
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 2 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 10 Jan 2019. 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 Taiwan. 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?
Incident VTE (time frame: 4 years). The study lists 7 primary outcomes in all. 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 10 Jan 2019.