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- Page navigation anchor for Fixed Ratio vs Lower Limit of Normal of FEV1/FVC in COPDFixed Ratio vs Lower Limit of Normal of FEV1/FVC in COPDShow More
Diagnosing disease means taking decisions: it is absent or present. As we are taught to discriminate between absence of presence of disease, we also look upon measures in a black and white manner. If a person is above a certain threshold he is supposed to be disease-free, if he is below the threshold he may have the disease. The division line is thin and absolute: in this case a 0.71 FEV1/FVC means no COPD and one of 0.69...
Competing Interests: None declared.