Analysis on prevalence of chronic obstructive pulmonary disease based on pulmonary function screening in Changchun urban area of Jilin province / 吉林大学学报(医学版)

ABSTRACT

Objective:To investigate the prevalence of chronic obstructive pulmonary disease (COPD) in the adults aged 40 years old and over in Changchun urban area,and to clarify the important significance of early application of pulmonary function examination.Methods:With the help of community workers,10 communities which around Second Hospital of Jilin University were selected and the participants aged 40 years old and over were randomly collected.COPD questionnaire and pulmonary function examination were conducted in all subjects.The patients with COPD were diagnosed according to the criteria established by the Global Initiative for COPD (GOLD).The patients with COPD were divided into the diagnostic group and undiagnostic group,then the patients with COPD who had smoking history were divided into smoking cessation group and smoking group.The pulmonary function of each groups were compared.Results:A total of 1 392 participants aged 40 years old and over were recruited in this survey,including 568 males and 824 females,and their average age was (59.59±6.60) years.Totally 176 subjects were diagnosed as COPD,and the prevalence was 12.64％.Furthermore,160 of them were newly diagnosed,which showed the undiagnostic rate of COPD was 90.91 ％.Among the 176 patients with COPD,16 had been confirmed before,which meant only 9.09％ patients got the accurate diagnose before.The analysis of high-risk factor (smoking) showed that the population had an increased prevalence of COPD (20.71％) compared with non-smokers (8.8％) (P＜ 0.05).The correlational analysis between smoking index and the pulmonary function of the patients with COPD showed that all of the pulmonary function indexes except forced vital capacity (FVC％) and maximum midexpiratory flow (MMEF％) in smoking cessation group were descended along with the increase of smoking index (P＜0.05).All of the pulmonary function indexes except FVC％ in smoking group were descended along with the increase of smoking index (P ＜ 0.05).Conclusion:The high prevalence and underdiagnostic rate of COPD are found in the residents aged 40 years old and over in Changchun urban area.More patients with COPD should be screened by performing pulmonary function examination to treat them at an early stage.