Patient characteristics.
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下载链接：
https://figshare.com/articles/dataset/_Patient_characteristics_/276969
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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
