Patient characteristics.
收藏NIAID Data Ecosystem2026-03-07 收录
官方服务：
资源简介：
FEV1 = Forced expiratory volume at 1 sec; FVC = Function vital capacity; SD = Standard deviation; COPD = Chronic obstructive pulmonary disease. GOLD (Global Initiative for Chronic Obstructive Lung Disease) Stages: 1 – mild COPD: FEV1≥80% predicted, FEV1:FVC<70%. 2 – moderate COPD: 50%≤FEV1≤80% predicted, FEV1:FVC<70%. 3 – severe COPD: 30%≤FEV1≤50% predicted, FEV1:FVC<70%. 4 – very severe COPD: FEV1<30%predicted or FEV1<50% predicted with chronic respiratory failure, FEV1:FVC<70%. Pack years: (Packs smoked per day)×(years as a smoker).
创建时间：
2012-07-19
