- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03470584
Vegetarian Diet and Chronic Degenerative Diseases
Vegetarian Diet and Chronic Degenerative Diseases in the Tzu Chi Health Study (TCHS) and the Tzu Chi Vegetarian Study (TCVS)
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
The Tzu Chi Vegetarian Study (TCVS) recruited 12062 community volunteers of the Buddhists Tzu Chi Foundation throughout Taiwan in the year 2005. All participants completed a self-administered questionnaire on basic information, medical history, lifestyle, and diet.
The Tzu Chi Health Study (TCHS) recruited 6002 participants who came to the Buddhist Tzu Chi Dalin General Hospital for health examination. All participants were interviewed on basic information, medical history, lifestyle, and diet. Biochemical and anthropometric data was collected through a health examination:
Biochemical variables: CBC, fasting glucose, lipid profile (TCH, LDL, HDL, TG), BUN, Cr, ALT, AST, and UA. In addition, homocysteine, serum vitamin B12, folate, and C-reactive protein (CRP) are available for 1500 subjects.
Blood: Extra blood samples have been obtained and stored for 3500 subjects and will be available for future investigation.
Anthropometric variables: body weight, height, waist circumference, % body fat (with BIA), blood pressure, pulse wave velocity, bone mineral density through DXA (at spine for female and hip for male), lung function test (spirometric), abdominal sonography, colonoscopy, esophageal-gastro-duodenal-scopy, chest X-ray, KUB.
Follow-up: Individual baseline data were linked to the National Health Insurance Database and the National Death Registry to ascertain disease outcomes at the Health and Welfare Data Science Center.
Study Type
Enrollment (Actual)
Contacts and Locations
Study Locations
-
-
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Chiayi City, Taiwan
- Dalin Tzu Chi Hospital
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Sampling Method
Study Population
Description
Inclusion Criteria:
- Participants who consent to be followed.
Exclusion Criteria:
- Participants with inaccurate ID which make linkage to NHIRD impossible.
- Participants already with study outcome (disease) prior to enrollment in the study.
- Participants with missing covariates
Study Plan
How is the study designed?
Design Details
- Observational Models: Cohort
- Time Perspectives: Prospective
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
Tzu Chi Vegetarian Study
12062 Tzu Chi volunteers of the Buddhist Tzu Chi Foundation recruited throughout communities in Taiwan in the year 2005.
All participants filled out a self-administered questionnaire on basic information, medical history, lifestyle, and diet.
Diet exposure: 1/3 vegetarians, 2/3 nonvegetarians.
|
Vegetarian diet vs nonvegetarian diet
|
Tzu Chi Health Study
6002 participants who came for health examination at the Dalin Tzu Chi Hospital between the years 2007 to 2009.
77% were Tzu Chi volunteers.
All participants were interviewed on a structured questionnaire including basic information, medical history, lifestyle, and diet, and received a comprehensive health examination.
Diet exposure: 1/3 vegetarians, 2/3 nonvegetarians.
|
Vegetarian diet vs nonvegetarian diet
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Gout
Time Frame: From enrollment to time of disease occurrence, death of any cause, or end of study period (December 31st 2014).
|
Incidence of gout are ascertained by linking individual participants' baseline data to the the National Health Insurance Database.
Cases of gout are identified using ICD-9 code: 274.
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From enrollment to time of disease occurrence, death of any cause, or end of study period (December 31st 2014).
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Stroke
Time Frame: From enrollment to time of disease occurrence, death of any cause, or end of study period (December 31st 2014).
|
Incidence of stroke are ascertained by linking individual participants' baseline data to the the National Health Insurance Database.
Cases of stroke are identified using ICD-9 code: 430-438, where hemorrhagic stroke is defined by ICD9 430-432 and ischemic stroke is defined by ICD9 433-434.
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From enrollment to time of disease occurrence, death of any cause, or end of study period (December 31st 2014).
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Cataract
Time Frame: From enrollment to time of disease occurrence, death of any cause, or end of study period (December 31st 2014).
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Incidence of cataract are ascertained by linking individual participants' baseline data to the the National Health Insurance Database.
Cases of cataract are identified using ICD-9 code: 366.
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From enrollment to time of disease occurrence, death of any cause, or end of study period (December 31st 2014).
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Gallstone disease
Time Frame: From enrollment to time of disease occurrence, death of any cause, or end of study period (December 31st 2014).
|
Incidence of gallstone disease are ascertained by linking individual participants' baseline data to the the National Health Insurance Database.
Cases of gallstone diseases are identified using ICD-9 code: 574.
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From enrollment to time of disease occurrence, death of any cause, or end of study period (December 31st 2014).
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Dementia and mild cognitive impairment
Time Frame: From enrollment to time of disease occurrence, death of any cause, or end of study period (December 31st 2014).
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Incidence of dementia are ascertained by linking individual participants' baseline data to the the National Health Insurance Database.
Cases of dementia and mild cognitive impairment are identified using ICD-9 code: 290.0, 290.1,290.4,
331.0, 331.1, 331.82, 331.83.
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From enrollment to time of disease occurrence, death of any cause, or end of study period (December 31st 2014).
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Depression
Time Frame: From enrollment to time of disease occurrence, death of any cause, or end of study period (December 31st 2014).
|
Incidence of depression are ascertained by linking individual participants' baseline data to the the National Health Insurance Database.
Cases of depression and are identified using ICD-9 code: 296.2, 296.3, 300.4 and 311.
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From enrollment to time of disease occurrence, death of any cause, or end of study period (December 31st 2014).
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Urinary tract infections (UTI)
Time Frame: From enrollment to time of disease occurrence, death of any cause, or end of study period (December 31st 2014).
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Incidence of UTI are ascertained by linking individual participants' baseline data to the the National Health Insurance Database.
Cases of UTI are identified using ICD-9 code: 599.0, 595, 590.
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From enrollment to time of disease occurrence, death of any cause, or end of study period (December 31st 2014).
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Medical expenditures
Time Frame: From enrollment to December 31st 2014.
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Actual medical expenditure associated with different dietary patterns are analyzed.
Medical expenditures are obtained and computed from the National Health Insurance Database claim data for outpatient treatment, inpatient treatment, and dental treatment.
This also includes costs associated with laboratory work and medication prescription.
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From enrollment to December 31st 2014.
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Collaborators and Investigators
Sponsor
Investigators
- Study Chair: Chin-Lon Lin, MD, Dalin Tzu Chi General Hospital
Publications and helpful links
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
Additional Relevant MeSH Terms
- Behavioral Symptoms
- Mental Disorders
- Digestive System Diseases
- Brain Diseases
- Central Nervous System Diseases
- Nervous System Diseases
- Infections
- Urologic Diseases
- Eye Diseases
- Neurocognitive Disorders
- Pathological Conditions, Anatomical
- Lens Diseases
- Gallbladder Diseases
- Biliary Tract Diseases
- Calculi
- Depression
- Cardiovascular Diseases
- Dementia
- Cataract
- Urinary Tract Infections
- Gallstones
- Cholelithiasis
- Cholecystolithiasis
Other Study ID Numbers
- TCHS-02
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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