Figure 2From: "GOLD or lower limit of normal definition? a comparison with expert-based diagnosis of chronic obstructive pulmonary disease in a prospective cohort-study"Change of the threshold of FEV1/FVC ratio will change the amount of misdiagnosis in both directions. Application of the LLN definition in elderly patients which generally results in FEV1/FVC levels smaller than 0.7 reduces the number of FP diagnoses but subsequently increases the FN.Back to article page