Clinical Features and Risk Factors of Asthma with Fixed Airflow Obstruction

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

TCTR

Registry ID

TCTR20241009001

Enrollment

290

Registered

2024-10-09

Start date

2024-11-01

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

Asthma Fixed airflow obstruction Asthma Bronchodilator responsiveness Eosinophil Fixed airflow obstruction Lung function

Interventions

Asthmatic patients aged 18-80 years and on asthma medications.

Other

Asthmatic patients

Eligibility

Sex/Gender

All

Age

18 Years to 80 Years

Inclusion criteria

Inclusion criteria: 1. Asthmatic patients diagnosed by physicians according to GINA guidelines, 2. Age 18-80 years, 3. On asthma medication

Exclusion criteria

Exclusion criteria: 1. No spirometry data, 2. Unaccepted spirometry results, 3. loss to follow-up after diagnosis, 4. Smoking history of 10 pack-years or more

Design outcomes

Primary

Measure	Time frame
Prevalence of asthma with FAO At the beginning of the study Percentage	—

Secondary

Measure	Time frame
Forced expiratory volume in one second (FEV1) in asthma with FAO At the beginning of the study Percentage,Bronchodilator responsiveness in asthma with FAO At the beginning of the study Percentage	—

Countries

Thailand

Contacts

Public ContactAtchara Rodgerd

Suratthani Hospital

atchara.chest@cpird.in.th075340250

Outcome results

None listed

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