Remission in Adults With Mild-to-moderate Asthma in Thailand

The goal of this observational study is to determine the prevalence of remission among adults with mild-to-moderate asthma, as well as the factors associated with remission in Thailand. The main question the study aims to answer is: What is the prevalence of remission among adults with severe asthma in Thailand? Participants will complete a questionnaire on asthma symptoms and undergo pulmonary function testing and a blood test once.

This study is a cross-sectional study. Thai patients aged 18 years or older with mild-to-moderate asthma are included in the study. Participants will complete two questionnaires about asthma control: the Global Initiative for Asthma (GINA) and the Asthma Control Test (ACT), and will perform spirometry, a fractional exhaled nitric oxide (FeNO) test, and blood eosinophil counts (BEC). GINA and ACT are questionnaires used to assess the level of asthma control.

Inclusion Criteria: * mild-to-moderate asthma * age 18 years or older Exclusion Criteria: * inability to perform spirometry or fractional exhaled nitric oxide (FeNO) test