NCLEX Question for stage of COPD

NCLEX Review Question

In which stage of COPD is the forced expiratory volume (FEV1) < 30%?

a.III
b.II
c.I
d.O

Correst Answer: A
III
Rationale: Stage III patients demonstrate FEV1 < 30% with respiratory failure or clinical signs of right heart failure

II
Rationale: Stage II patients demonstrate FEV1 between > 30% and 80%

I
Rationale: Stage I is mild COPD with FEV1 < 70%.

O
Rationale: Stage O is characterized by normal spirometry

Posted in: MSN NCLEX