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The relationship between absolute FEV1 and breathlessness (mMRC ≥ 2) by sex in people with (A) normal FEV1 (≥80% of predicted) and (B) impaired FEV1 (<80% of predicted). Lower FEV1 was associated with more breathlessness, both among men and women. When compared at a similar absolute FEV1, breathlessness was similar between men and women. mMRC = modified Medical Research Council breathlessness scale.
