2.1 Study population
The survey was carried out in five hospitals in different regions of Shanghai, including Longhua Hospital of Shanghai University of TCM, Pudong New District Hospital of TCM, Fengxian District Hospital of TCM, Jiading District Hospital of TCM, Shanghai Seventh People’s Hospital.
Prior to the start of the project, training sessions on research plan and questionnaires will be held. After that, 420 children with chronic cough who met the diagnostic criteria were collected and analyzed statistically.