Gastroesophageal dysmotility is associated with the impairment of cough-specific quality of life in patients with cough variant asthma

Publication date: Available online 4 April 2016
Source:Allergology International
Author(s): Yoshihiro Kanemitsu, Akio Niimi, Hisako Matsumoto, Toshiyuki Iwata, Isao Ito, Tsuyoshi Oguma, Hideki Inoue, Tomoko Tajiri, Tadao Nagasaki, Yumi Izuhara, Guergana Petrova, Surinder S. Birring, Michiaki Mishima
BackgroundGastroesophageal reflux disease (GERD) is known as a common comorbidity of asthma and chronic cough. The impact of GERD symptoms on cough-specific quality of life (QoL) in patients with asthmatic cough is poorly understood. The aim of this study is to determine the association of GERD symptoms with cough-specific quality of life in patients with cough variant asthma (CVA) using the Leicester Cough Questionnaire (LCQ).MethodsA total of 172 consecutive patients (121 females) with mean cough duration of 45.1 months (range 2–480 months) completed the Japanese version of the LCQ. The Frequency Scale for the Symptoms of Gastroesophageal reflux was administered to assess symptoms of acid-reflux and dysmotility. A range of clinical variables that may determine cough-specific QoL (LCQ) were estimated.ResultsThe mean LCQ scores was 12.9 (SD 3.5), consistent with severe impairment in QoL. Female gender, symptoms of gastroesophageal dysmotility, sensitization to allergens (house dust and Japanese cedar pollen) and the number of sensitized allergens were associated with lower LCQ scores (i.e. impaired cough-specific QoL) in univariate regression analysis. Acid-reflux symptoms, airway hyperresponsiveness, fractional exhaled nitric oxide, and sensitization to molds were unrelated to the LCQ score. After adjustment for gender, symptoms of gastroesophageal dysmotility was the only significant determinant of impaired cough-specific QoL accounting for 23% of the variance.ConclusionsCough-specific QoL is severely impaired in patients with CVA. Symptoms of gastroesophageal dysmotility are an independent predictor of cough-specific QoL of patients with CVA.



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