Tuberculosis in China
|First Submitted Date||February 18, 2010|
|First Posted Date||February 19, 2010|
|Last Update Posted Date||October 19, 2017|
|Start Date||February 2, 2010|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures||Not Provided|
|Original Primary Outcome Measures||Not Provided|
|Change History||Complete list of historical versions of study NCT01071603 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures||Not Provided|
|Original Secondary Outcome Measures||Not Provided|
|Current Other Outcome Measures||Not Provided|
|Original Other Outcome Measures||Not Provided|
|Brief Title||Tuberculosis in China|
|Official Title||A Natural History Study of Tuberculosis in China; Correlates of a Successful Response to Treatment|
- In spite of well-researched treatments and therapies, 5 to 10 percent of tuberculosis (TB) patients who have initially successful TB treatments will relapse, usually within a year after completion of therapy. This percentage is even greater for patients who are infected with multi-drug resistant and extensively drug resistant types of TB. Because the People s Republic of China has the second highest number of TB cases in the world, researchers are interested in studying TB patients in China to evaluate their response to treatment on a long-term basis.
- Individuals between 18 and 65 years of age who have been admitted to Henan Provincial Chest Hospital with suspected tuberculosis.
Despite optimal antimicrobial treatment with directly observed short-course therapy (DOTS), about 5-10 percent of drug-compliant patients with cured tuberculosis (TB or MTB) relapse, usually within a year after completion of therapy. This percentage is even greater for patients that have previously been treated for TB who often are infected with multi-drug resistant (MDR) and extensively drug resistant (XDR) organisms. The People s Republic of China has the second highest number of cases of TB in the world, with a rate of 101 cases/100,000 person-years estimated for 2004. Based on the data of the 4th national TB epidemiological survey in 2000, it is estimated that there were 1.96 million instances of pulmonary TB. With an established MDR TB prevalence of 10.7 percent, there were an estimated 209,720 cases of pulmonary, bacteriology confirmed MDR TB in China in 2000. About half of all prevalent cases of TB disease in 2000 were extrapulmonary.
This prospective longitudinal natural history study will monitor 150 subjects with suspected TB at the Henan Provincial Chest Hospital during their initial response to antituberculous chemotherapy. The subjects will be divided into 3 groups of TB-infected individuals: Cohort A) acid-fast bacilli (AFB) smear positive pulmonary disease; Cohort B) smear negative pulmonary disease; and Cohort C) extra-pulmonary disease (EPTB) in order to reflect the spectrum of TB manifestations observed at Henan Provincial Chest Hospital. We will also be enrolling 45 non-TB suspects as controls (Cohort D). The control group will serve as a comparison group for exploratory immunologic and diagnostic assays that may, in the future, serve as ways to diagnose TB and/or evaluate response to therapy.
In this exploratory study, we will be looking at the change in total volume of disease as detected by computerized tomography scans of the chest at baseline, at 2 months, and at 6 months. We will also be looking at scanned regions of extrapulmonary TB. In addition, we will monitor chemotherapeutic regimen, changes in the host immune response, overall changes in clinical parameters, initial and acquired drug-resistance of the infecting isolates, and changes in bacterial and host markers in subject samples during chemotherapy. In each case, we will look for associations of these parameters with rates of disease resolution correlated with specific structural features determined by computerized tomography scanning of the sites of TB disease (with the exception of TB meningitis and cutaneous TB, for which there are no specific lesions to follow radiographically). These studies will allow us to evaluate the use of entry criteria in future clinical trials and eventual TB diagnosis confirmation using these entry categorizations. We will also be able to examine the impact of initial regimen selection, and subsequent modifications, mycobacterial strain characteristics, extent of disease, types of lesions and host immunologic response to the overall outcome of chemotherapy, as well as potentially identify surrogate markers for improving monitoring of the response to chemotherapy.
|Study Design||Time Perspective: Prospective|
|Target Follow-Up Duration||Not Provided|
|Sampling Method||Not Provided|
|Study Population||Not Provided|
|Study Groups/Cohorts||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Completion Date||Not Provided|
|Primary Completion Date||Not Provided|
A subject must fulfill all inclusion criteria within his or her assigned cohort in order to be eligible to participate in this study.
Smear Positive TB (Cohort A)
Smear Negative TB (Cohort B)
Extra Pulmonary TB (Cohort C)
If presently on anti-TB chemotherapy, having a regimen which started not more than 14 days prior to enrollment (please see note below)
Controls (Cohort D):
A subject will be excluded from this study if he or she meets any of the following exclusion criteria from their assigned cohort. Also, potential participants may be excluded from the study on the basis of the investigator s judgment concerning the ability to comply with study procedures or posing an undue risk to the subject.
Cohort C Only
Evidence of pulmonary TB (If subject at enrollment is suspected to have both pulmonary TB and extrapulmonary TB, then s/he will be enrolled into Cohort A or B)
Cohort D (Controls)
Cohort A-C Scan Exclusions
The following will still be included in the study; however they will be excluded from the CT scanning (enrollment and follow-up) only:
Note that if subjects excluded by these above criteria for a study-related CT scan still require a CT scan because of medical necessity, the results of the CT scan will be collected by the study.
|Ages||18 Years to 65 Years (Adult)|
|Accepts Healthy Volunteers||No|
|Contacts||Contact information is only displayed when the study is recruiting subjects|
|Listed Location Countries||China|
|Removed Location Countries|
|Other Study ID Numbers||999910060
|Has Data Monitoring Committee||Not Provided|
|U.S. FDA-regulated Product||Not Provided|
|IPD Sharing Statement||Not Provided|
|Responsible Party||National Institutes of Health Clinical Center (CC) ( National Institute of Allergy and Infectious Diseases (NIAID) )|
|Study Sponsor||National Institute of Allergy and Infectious Diseases (NIAID)|
|PRS Account||National Institutes of Health Clinical Center (CC)|
|Verification Date||June 27, 2017|