Secondary outcome measures were changes in COPD
knowledge, awareness, and risk factors, which were measured with a survey that included questions on epidemiology, prevention, treatment, and rehabilitation. The questionnaire consisted of 100 items (each item assigned one score) designed by us. Cumulative COPD deaths for all causes within 96 months were entered through our link to the China Information System for Disease Control and Prevention, and the authors verified the information for each deceased subject. Changes in anxiety and depression symptoms were measured with the Hospital Anxiety and Depression Scale (HADS), in which higher scores indicate
a greater likelihood of anxiety or depression. Changes
in hospital admissions and emergency department visits, as well as changes in medication regimens, were obtained by subject interview, health-care databases, or prospectively from diary cards, and frequency was recorded.
 
Secondary outcome measures were changes in COPDknowledge, awareness, and risk factors, which were measured with a survey that included questions on epidemiology, prevention, treatment, and rehabilitation. The questionnaire consisted of 100 items (each item assigned one score) designed by us. Cumulative COPD deaths for all causes within 96 months were entered through our link to the China Information System for Disease Control and Prevention, and the authors verified the information for each deceased subject. Changes in anxiety and depression symptoms were measured with the Hospital Anxiety and Depression Scale (HADS), in which higher scores indicatea greater likelihood of anxiety or depression. Changesin hospital admissions and emergency department visits, as well as changes in medication regimens, were obtained by subject interview, health-care databases, or prospectively from diary cards, and frequency was recorded.
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