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Hair Counts From Vertical and Horizontal Sections of Scalp Biopsy SPecimens in Thai Population With Alopecia (ThaiScalpBx)

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified July 2012 by Rattapon Thuangtong, Siriraj Hospital.
Recruitment status was:  Enrolling by invitation
Information provided by (Responsible Party):
Rattapon Thuangtong, Siriraj Hospital Identifier:
First received: July 25, 2012
Last updated: NA
Last verified: July 2012
History: No changes posted
Hair disorders, expecialy scarring alopecia were diagnosed by scalp biopsy specimens in horizontal and vertical sections.(1-4) Data on hair density in Thais are lacking, although in Asians have more fewer hairs than whites.(5-7)Howevery, previous study from East Asian just had only one study and the data was more differently from West Asian and whites. Then this study was performed to evaluate hair density in Thais, and compared to previous study.


Study Type: Observational
Study Design: Observational Model: Case-Only
Time Perspective: Prospective
Official Title: Hair Counts From Vertical and Horizontal Sections of Scalp Biopsy SPecimens in Thai Population With Alopecia

Resource links provided by NLM:

Further study details as provided by Rattapon Thuangtong, Siriraj Hospital:

Biospecimen Retention:   Samples Without DNA
scalp biopsy specimen

Estimated Enrollment: 50
Study Start Date: October 2010
Estimated Study Completion Date: May 2013
Estimated Primary Completion Date: April 2013 (Final data collection date for primary outcome measure)
Scalp biopsy
Subjects are on scadule list for hair transplantation in Siriraj hospital. Scalp biopsy with punch biopsy No.4 Scalp biopsy by punch biopsy No.4 at occipital area was done in subjects who have hair transplantaion.


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Thai patients who have alopecia and on scadule for hair transplantation

Inclusion Criteria:

  • Thai
  • Age >= 18 years
  • Diagnosis alopecia and on list for hair transplantation in Siriraj hospital

Exclusion Criteria:

  • Alopecia areata or positive hair pulling test
  • Underlying disease : DM, chronic renal failure, chronic liver disease
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Please refer to this study by its identifier: NCT01651689

Siriraj hospital
Bangkok, Thailand, 10700
Sponsors and Collaborators
Siriraj Hospital
Principal Investigator: Rattapon Thuangtong, MD Department of Dermatology, Siriraj hospital, Faculty of Medicine, Mahidol University, Thailand
  More Information

Responsible Party: Rattapon Thuangtong, Assistant Professor, Siriraj Hospital Identifier: NCT01651689     History of Changes
Other Study ID Numbers: SirirajH-003
553/2553(EC3) ( Registry Identifier: 553/2553(EC3) )
Study First Received: July 25, 2012
Last Updated: July 25, 2012

Keywords provided by Rattapon Thuangtong, Siriraj Hospital:
Scalp biopsy
Hair count
Vertical section
Horizontal section

Additional relevant MeSH terms:
Alopecia Areata
Hair Diseases
Skin Diseases
Pathological Conditions, Anatomical processed this record on May 25, 2017