Prevalence of asthma and level of fractional exhaled nitrogen oxide among Malaysian school children

Materials and methods The use of FeNO measurements in clinical practice has been increasingly accepted based on a number of theoretical and practical factors. It is not only a user friendly, portable and non-invasive assessment tool, but is also able to detect inflammatory airway changes in children exposed to atmospheric pollutions. The study respondents were randomly selected from secondary school students in Terengganu, Malaysia. A questionnaire with previously tested questions was used to obtain information on the respondents’ living conditions, school environment, asthmatic symptoms and allergies. FeNo measurement was conducted using a NIOX-MINO (50 ml/min flow) instrument.