Department of Pulmonology, JSS Medical College & Hospital, JSS University, Mysore, India.
Indian J Med Res. 2011 Jul;134(1):91-100.
BACKGROUND & OBJECTIVES: Chronic cough and chronic phlegm are important indicators of respiratory morbidity, accelerated lung function decline, increased hospitalization and mortality. This study was planned to estimate the prevalence of chronic cough and phlegm in the absence of dyspneoa and wheezing and to study its associated factors in a representative population of Mysore district.
A cross-sectional survey was planned in a representative population of Mysore taluk. Eight villages were randomly selected based on the list of villages from census 2001. Trained field workers using the Burden of Obstructive Diseases questionnaire carried out a house-to-house survey.
A total of 4333 adult subjects were enrolled in the study with 2333 males and 2000 females. The prevalence of chronic cough in the community was 2.5 per cent and that of chronic phlegm was 1.2 per cent. A significant association was observed between chronic cough and age, gender, occupation and smoking and chronic phlegm with age, gender, occupation, indoor animals and smoking. A multivariate analysis confirmed independent association of age, occupation and smoking for chronic cough and age and smoking for chronic phlegm. On sub-group analysis of males, heavy smokers had higher prevalence of chronic cough and chronic phlegm as compared to light smokers and non smokers.
INTERPRETATION & CONCLUSIONS: The prevalence of chronic cough was 2.5 per cent and chronic phlegm was 1.2 per cent in the general population in Mysore which is lower than that observed in other studies. Heavy smoking was an important preventable risk factor identified in this study and efforts towards smoking cessation are crucial to achieve good respiratory health in the community.
慢性咳嗽和慢性咳痰是呼吸系统发病率、肺功能加速下降、住院和死亡率增加的重要指标。本研究旨在评估无呼吸困难和喘息的慢性咳嗽和咳痰的患病率，并研究其在迈索尔区代表性人群中的相关因素。
在迈索尔县进行了一项横断面调查。根据 2001 年人口普查的村庄名单随机选择了 8 个村庄。经过培训的现场工作人员使用《阻塞性疾病负担问卷》进行了逐户调查。
共有 4333 名成年受试者参加了这项研究，其中男性 2333 人，女性 2000 人。社区慢性咳嗽的患病率为 2.5%，慢性咳痰的患病率为 1.2%。慢性咳嗽与年龄、性别、职业和吸烟之间存在显著相关性，慢性咳痰与年龄、性别、职业、室内动物和吸烟之间存在显著相关性。多变量分析证实，年龄、职业和吸烟是慢性咳嗽的独立相关因素，年龄和吸烟是慢性咳痰的独立相关因素。在男性亚组分析中，与轻吸烟者和不吸烟者相比，重度吸烟者的慢性咳嗽和慢性咳痰患病率更高。
在迈索尔的一般人群中，慢性咳嗽的患病率为 2.5%，慢性咳痰的患病率为 1.2%，低于其他研究观察到的患病率。重度吸烟是本研究中确定的一个重要可预防危险因素，因此努力戒烟对于实现社区良好的呼吸健康至关重要。
