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Current COPD Cutoff Confirmed: JAMA Study Highlights
Confirmed: FEV1:FVC <0.70 proves to be the optimal threshold to identify risk of COPD vs less than LLN and other fixed values.
The ratio of the forced expiratory volume in the first second to the forced vital capacity (FEV1/FVC) is measured relatively easily in the clinic using spirometry. Many professional organizations (eg, American College of Physicians, American College of Chest Physicians, European Respiratory Society) have long recommended the ratio of FEV1/FVC
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