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CompletedNCT01850043Updated Dec 12, 2013

The Epidemiology of TST Change in Korea

An observational study in Tuberculosis and Latent Tuberculosis, sponsored by Asan Medical Center. Completed at 1 site in Korea, Republic of. Open to male participants aged 18 Years to 29 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2013-12-12.

Sponsored by Asan Medical Center · Observational

Study type
Observational
Model
Ecologic or community
Time perspective
Prospective
Enrollment
5,552
Ages
18 Years to 29 Years
Sex
Male
01

Study summary

TST will be analyzed in young general population in Korea. Young adults undertake TST as CDC recommendation. Participants with chest radiograph showing active TB lesion are excluded from this study.

Read the detailed description

Enroll criteria

  • A term of whole military conscripts per year in one Reserve Force Battalion
  • Military conscripts gather from all around area in Korea randomly
  • Each participant undertake a chest X-ray (CXR) and blood tests including human immunodeficiency virus (HIV) at the start of initiatory training.

Exclusion Criteria

  • Chest X-ray suggesting active TB
  • HIV positive in serology

Design

  • After giving informed consent, all participants receive one-step TST following standard procedures.
  • The largest transverse diameter of induration is measured 48-72hr after injection.
  • The investigator and these trained nurses were blinded to the status of their demographic characteristics.
02

Conditions studied

  • Tuberculosis
  • Latent Tuberculosis
03

In context

Tuberculosis

1,417 studies on the registry are indexed under Tuberculosis; 208 are open to participants now.

This study's enrollment of 5,552 is above the median of 250 across 421 observational studies indexed under Tuberculosis.

Browse Tuberculosis studies →

Lead sponsor

Asan Medical Center is the lead sponsor of 562 studies on the registry; 71 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 29 Years
Sexes eligible
Male
Accepts healthy volunteers
Yes
Sampling method
Non-probability sample

Study population

A term of whole military conscripts per year

Inclusion criteria

  • Military Conscripts age 18-29 years old

Exclusion criteria

Exclusion Criteria:

  • Chest X-ray suggests active TB
  • Positive HIV in serology
05

Study design

Observational model
Ecologic or community
Time perspective
Prospective
Enrollment
5,552 participants (actual)
Patient registry
No

Groups and cohorts

  • Military Conscripts

    A term of whole military conscripts per year in one Reserve Force Battalion. Military conscripts gather from all around area in Korea randomly

06

What researchers measure

Primary outcomes

  1. TST positivity TST rate

    Investigators measure induration size of tuberculin skin test 48 after tuberculin injection.

    Time frame: Two days after tuberculin injection

Secondary outcomes

  1. BCG scar rates

    Time frame: The day of tuberculin injection

07

Study locations

1 site
  • The Korean Institute of Tuberculosis
    Osong, Chungcheongbuk-Do 396-954, Korea, Republic of
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 12, 2013, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT01850043
Lead sponsor
Asan Medical Center
Responsible party
Sei Won Lee (Assistant Professor, Asan Medical Center) — Principal investigator
First posted
May 9, 2013
Start date
May 2005
Primary completion
May 2012
Completion
May 2012
Last update
Dec 12, 2013

Study contacts

HeeJin Kim, MD
principal investigator · The Korean Institute of Tuberculosis

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Dec 2013. You cannot join it, but the record below documents what was studied.

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