LEAD LEVEL IN HAIR AND ATTENTION DEFICIT AND HYPERACTIVE DISORDER (ADHD) IN THAI CHILDREN

THE ASSOCIATION OF LEAD LEVEL IN HAIR TO ATTENTION DEFICIT AND HYPERACTIVE DISORDER (ADHD) IN THAI CHILDREN

Status

Recruiting

Phases

Unknown

Study type

Observational

Source

TCTR

Registry ID

TCTR20151113001

Enrollment

130

Registered

2015-11-13

Start date

2015-10-27

Completion date

Unknown

Last updated

2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Attention Deficit and Hyperactive disorder Attention Deficit Hyperactivity ADHD Thai children

Interventions

1. Newly diagnosed&#44

no history of treatment&#44

for ADHD 2. Need to fulfill the diagnostic criteria of ADHD by DSM&#45

V 3. Age 3&#45

7 years old. 4. Thai nationality with both parents holding Thai nationality. 5. Reside in Bangkok Metropolitan region (Bangkok and the entire 5 adjacent provinces including Nakhon Pathom&#44

Pathum Thani&#44

Nonthaburi&#44

Samut Prakan and Sumut Sakhon) ,1. No history of ADHD or other mental health problems 2. Age 3&#45

7 years old. 3. Thai nationality with both parents holding Thai nationality. 4. Reside in Bangkok Metropolitan region (Bangkok and the entire 5 adjacent provinces including Nakhon Pathom&#44

Samut Prakan and Sumut Sakhon) 5. Match to case with the matching criteria. 6. Sibling of case is preferable to exclude possible genetic&#44

environment and lifestyle confounding factors.

Screening,Screening

ADHD,Sibling Control

Eligibility

Sex/Gender

All

Age

3 Years to 7 Years

Inclusion criteria

Inclusion criteria: 1. Newly diagnosed, no history of treatment, for ADHD 2. Need to fulfill the diagnostic criteria of ADHD by DSM-V 3. Age 3-7 years old. 4. Thai nationality with both parents holding Thai nationality.

Exclusion criteria

Exclusion criteria: 1. Children with other associated mental health problems (e.g. learning disability, Down syndrome, depressive or bipolar disorder, anxiety disorder, dissociative disorder, personality disorder, or substance intoxication or withdrawal, schizophrenia or other psychotic disorder). 2. Children who is continuously treated by any medications for over 3 months. 3. Children with dyed scalp hair or hair discoloring from any causes.

Design outcomes

Primary

Measure	Time frame
the level of lead in hair in both study groups. 0 ICP-MS	—

Secondary

Measure	Time frame
the level of lead in blood of ADHD groups 0 graphite furnace atomic absorption	—

Countries

Thailand

Contacts

Public ContactTorsak Tippairote

Institute of Nutriion, Mahidol University

torsak.tip@student.mahidol.ac.th66818584975

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026