The baseline characteristics of study population.
收藏NIAID Data Ecosystem2026-03-07 收录
数据链接：
官方服务：
资源简介：
Abbreviations: COPD, chronic obstructive pulmonary disease. Data are expressed as mean (standard deviation or SD) or percentage as indicated. *data not available. **P values were calculated by using unpaired t-test for age, and by χ2 test for other categorical characteristics.
创建时间：
2013-07-11
