solved

A 65-year-old man presents to your practice with dyspnea, especially with exertion and a cough. He is a 40 pack per year smoker with no relevant occupational exposures.
Pre-Bronchodilator Response Post- Bronchodilator Response
Test
Actual
Predicted
% Predicted
% Change
FVC (L)
2.25
3.75 60 % +2
FEV1 (L)
1.1
3.0 36% +3
FEV1/FVC (%)
49 %
80 %
4
+1
DLCO
40%
what is the diagnosis?

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