- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03826329
Risk Factors of Second Surgery for Adjacent Segment Disease Following Anterior Cervical Discectomy and Fusion (2nd ACDF)
Risk Factors of Second Surgery for Adjacent Segment Disease Following Anterior Cervical Discectomy and Fusion: a 16-year Cohort Study
Study Overview
Detailed Description
All second ACDF surgery after one year from the first ACDF were identified as a consequence of ASD that required another surgery. A multivariate competing risk survival model, Kaplan-Meier survivorship, and average time to events were calculated.
2.1. Data source and ethical concerns The study used the National Health Insurance Research Database (NHIRD), a national database containing 26 million administered insurants accumulated from January 1997 to December 2013, provided by the National Health Research Institutes of Taiwan. Due to the unique social-welfare health insurance system operated by the government, it is mandatory for every resident in Taiwan to be enrolled. Thus, the NHIRD has covered 99% of the population since its launch in 1996. The monopolistic national health insurance also offers unrestricted access to any healthcare provider of the patients' choices. The statistics, therefore, gathered by the NHIRD represent a sound cohort for investigation of the natural course and subsequent management of diseases. It is particularly good for studies that need longitudinal observation for repeat treatment (i.e. surgery for ASD) because it allows for the capture of events, even though they may occur in multiple or different institutes and hospitals. The universal coverage and comprehensive follow-up provided a valuable chance to study ASD.
All the personal information had already undergone a de-identification and encryption process. Individual and hospital identifiers are unique to the research database and researchers therefore cannot trace individual patients or health service providers.
Study Type
Enrollment (Actual)
Contacts and Locations
Study Locations
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Taipei, Taiwan
- Yu-Chun Chen
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
- Child
- Adult
- Older Adult
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:
- patients who had been admitted for their first ACDF surgery during the 16-year span, began on January 1st, 1998 till the end of 2013, recorded in the NHIRD
Exclusion Criteria:
- any re-operation (i.e. ACDF) within 365 days from the indexed date of the first ACDF were excluded.
Study Plan
How is the study designed?
Design Details
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
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Study Cohort
The observational study included all patients who had been admitted for their first ACDF surgery during the 16-year span, began on January 1st, 1998 till the end of 2013, recorded in the NHIRD.
The admission for cervical disc herniation and spondylosis were identified using the ICD9-CM diagnostic codes of 722.0, 722.4 and 722.71, while the surgery of ACDF was confirmed with the procedure codes of 80.51, 81.00 and 81.02 during the same hospitalization.
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this is an observational study, there is no intervention in this study
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
The date of re-operation (Second ACDF)
Time Frame: from patient's index surgery to the end of follow-up (2013/12/31), 4.66 years in average
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Patients were followed-up for the subsequent surgery (second ACDF) after their index operation (first ACDF).
We used the hospitalization date of each admission record as the date of outcome (second ACDF).
Each patient was followed-up from his index surgery (first ACDF) to re-operation (second ACDF), death, or end of follow-up (2013/12/31) which comes first.
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from patient's index surgery to the end of follow-up (2013/12/31), 4.66 years in average
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Collaborators and Investigators
Investigators
- Principal Investigator: Yu-Chun Chen, Taipei Veterans General Hospital, Taiwan
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Other Study ID Numbers
- 2018-09-006CC
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
IPD Plan Description
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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