Patients with symptoms such as cough and chest tightness, but with normal lung function test results: FEV1/FVC=70%, FEV1%pred and/or FVC%pred<80%
Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: 1.Subjects aged between 40-80 years old; 2.Willing to participate in the study and to sign the informed consent form; 3.Complete the standard respiratory tract epidemiology questionnaire included in this study; 4.Lung function tests were completed for prebronchodilator and post-bronchodilator examinations;
Exclusion criteria
Exclusion criteria: 1.Subjects aged 80 years; 2.Respiratory tract infection or aggravation within 4 weeks before screening; 3.Psychosis, auditory hallucinations, visual hallucinations, or taking antipsychotic medication; 4.After lobectomy; 5.A heart attack within 3 months;
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Lung function; | — |
Countries
China
Contacts
Chengyang People's Hospital