Effects of air pollution on subjects with chronic respiratory diseases

• Conditions: 1. COPD2. asthma3. Healthy subjects; air pollution,; COPD,; asthma

• Registration Number: TCTR20221118003
• Lead Sponsor: Faculty of Medicine, Chiang Mai University

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Study Start: 2022-11-18
• Study Completion: 2023-09-30
• Last Update Posted: 19 August 2024

Recruitment & Eligibility

• Status: Pending (Not yet recruiting)
• Sex: All
• Target Recruitment: 124

Inclusion Criteria

1. COPD subjects with stable disease, age more than 40 years old
2. Asthma subjects with stable disease, age more than 20 years old
3. Healthy subjects with age more than 20 years old

Exclusion Criteria

1. Subjects with uncontrolled underlying diseases.
2. Current smokers
3. Body mass index more than 30 kg/m2

Study & Design

• Study Type: Observational
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
fractional exhaled nitric oxide (FeNO) 2 (at pollution period and non pollution period) ppb

Secondary Outcome Measures

Name	Time	Method
Forced expiratory volume in the first second (FEV1) 2 (at pollution period and non pollution period) %,airway resistance 2 (at pollution period and non pollution period) cmH2O