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Background
Fractional exhaled nitric oxide (FeNO) is a well‐known marker of type‐2 inflammation. FeNO is elevated in asthma and allergic rhinitis, with IgE sensitization as a major determinant.
Objective
We aimed to see whether there was an independent association between upper airway inflammatory disorders (UAID) and FeNO, after adjustment for asthma and sensitization, in a multi‐centre population‐based...
Despite the well-known association between asthma and rhinitis, in Swedish adults the prevalence of rhinitis rose from 22% to 31% between 1990 and 2008 while asthma prevalence was unchanged. We tested whether the association of rhinitis with asthma was stable over time using the same population-based databases.Two surveys of adults (20–44 years) living in three regions of Sweden, carried out in 1990...
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