Obstructive vs. restrictive lung disease

Question 1

Normal

Answer 1

FEV1/FVC =80%

Question 2

Obstructive

Answer 2

FEV1/FVC = <80%

Question 3

Restrictive

Answer 3

FEV1/FVC >80%

Question 4

Obstructive and restrictive

Answer 4

IN BOTH CASES, both FEV1 and FVC are reduced

In obstructive, however, FEV1 is more dramatically reduced compared to FVC, resulting in a low FEV1/FVC ratio