402
Participants
Start Date
March 20, 2017
Primary Completion Date
March 16, 2022
Study Completion Date
March 16, 2022
Budesonide/formoterol
On the foundation of basic treatment strategies, inhaled budesonide/formoterol（160ug/4.5ug）will be used as an intervention drug for patients in PIC group. When air quality index (AQI) is above 200, they will temporary add one inhalation of budesonide/formoterol（160ug/4.5ug）twice a day until the third day after AQI drops below 200.
tiotropium bromide
Inhaled tiotropium bromide(18ug) will be used as routine medicine according to doctor's advice.
Peking University First Hospital, Beijing
Aerospace 731 Hospital, Beijing
Beijing Changping Hospital, Beijing
Beijing Jingmei Group General Hospital, Beijing
Beijing Jishuitan Hospital, Beijing
Beijing Luhe Hospital, Beijing
Beijing Miyun Hospital, Beijing
Civil Aviation General Hospital, Beijing
Peking University Shougang Hospital, Beijing
People's Hospital of Beijing Daxing District, Beijing
The Hospital of Shunyi District Beijing, Beijing
Peking University Shougang Hospital
OTHER
People's Hospital of Beijing Daxing District
OTHER
Beijing Jingmei Group General Hospital
UNKNOWN
Beijing Miyun Hospital
UNKNOWN
The Hospital of Shunyi District Beijing
UNKNOWN
Beijing Luhe Hospital
OTHER
Civil Aviation General Hospital
OTHER
Beijing Jishuitan Hospital
OTHER
Aerospace 731 Hospital
OTHER
Beijing Changping Hospital
UNKNOWN
Peking University First Hospital
OTHER