A pilot study of oral and gut microbiome profiling in heavy smokers and second-hand smokers

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

TCTR

Registry ID

TCTR20200625003

Enrollment

150

Registered

2020-06-25

Start date

2020-08-12

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

Current heavy smokers and second&#45

Interventions

hand smokers,Control

The participants in the heavy smoker&#39

s group are current heavy smokers. ,The participants in the second&#45

hand smoker&#39

s group are the family members of the heavy smoker&#39

s group. ,The participants in the control group are never smokers.

Screening,Screening,Screening

Heavy smokers,Second&#45

Eligibility

Sex/Gender

All

Age

25 Years to 70 Years

Inclusion criteria

Inclusion criteria: Current heavy smokers Second-hand smokers

Exclusion criteria

Exclusion criteria: Participants with unstable medical or psychiatric conditions Antibiotics used in 3 months

Design outcomes

Primary

Measure	Time frame
Oral and gut microbiome profiling 2 years Operational taxonomic units of oral and gut microbiome	—

Secondary

Measure	Time frame
N/A N/a N/A	—

Countries

Thailand

Contacts

Public ContactChirayu Auewarakul

Chulabhorn Royal Academy

chirayu.aue@pccms.ac.th025766000

Outcome results

None listed

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

A pilot study of oral and gut microbiome profiling in heavy smokers and second&#45;hand smokers