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The prevalence of asthma symptoms in students ranging in age from 18 to 24 years. Overall, 77 (13.2%) of 584 students experienced any asthmatic symptoms within the last year. One-year prevalence of asthma symptoms in university students ranging in age from 18 to 24 years was expected to be 13.2% at a maximum (A). FENO was over 38.0 ppb in 42 of the 77 students. The prevalence of asthma symptoms was estimated to be 7.2% by considering FENO levels (B).
