Prevalence of Airflow Limitation in Patients Diagnosed and Treated for Symptoms of Chronic Bronchitis by General Practitioners in Tochigi Prefecture, Japan
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概要
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Objective Physicians have provided care to only 0.2 million of the 5.3 million Japanese over the age of 40 years old who have chronic obstructive pulmonary disease (COPD). Among such individuals, many patients with respiratory symptoms diagnosed as chronic bronchitis (CB) are prescribed mainly expectorants. To determine the current status of COPD subjects diagnosed with and treated for CB, we investigated the prevalence of airflow limitation (AFL) in CB patients diagnosed by general practitioners (GPs) and the therapies administered to them. Methods Patients receiving treatment by GPs as CB completed a questionnaire and the FEV1/FEV6 ratio was measured by their GPs with a Piko-6. The prevalence of AFL (FEV1/FEV6 <73%) and the correlation between FEV1/FEV6 and FEV1/FVC were examined. Prescription behavior and comorbid lifestyle diseases were also examined. Results Data from 197 patients with CB were analyzed. Among those who underwent spirometry, the correlation between FEV1/FVC and FEV1/FEV6 was r2=0.38 (p<0.0001), and the sensitivity and specificity of the Piko-6 were 85.7% and 61.1%, respectively. The prevalence of AFL was 47.2% and increased to 54.1% among patients aged 70-79 years. Expectorants were prescribed for 39.8% of CB patients with AFL, but inhaled bronchodilators were prescribed for only 22.6%. Smoking history and age were significantly higher in the group with AFL than in those without AFL (p<0.05). The prevalence of comorbid lifestyle diseases was 73.1% in patients with AFL. Conclusion AFL was prevalent among patients with CB. Therefore, GPs should test pulmonary function in CB patients to ensure that the appropriate therapy is administered.
著者
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Ishii Yoshiki
Department Of Biology Faculty Of Science Kobe University
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Fukuda Takeshi
Department Of Applied Chemistry And Biotechnology Graduate School Of Engineering University Of Fukui
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Chibana Kazuyuki
Department Of Pulmonary Medicine And Clinical Immunology Dokkyo University School Of Medicine
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Ishii Yoshiki
Department of Pulmonary Medicine and Clinical Immunology, Dokkyo University School of Medicine, Japan
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Chibana Kazuyuki
Department of Pulmonary Medicine and Clinical Immunology, Dokkyo University School of Medicine, Japan
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Anraku Yukitaka
Omochanomachi Medical Clinic, Japan
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