Utilidad del límite inferior de normalidad de la espirometría en pacientes diagnosticados de EPOC

We obtain two groups of patients with differentiated clinical characteristics if we use LLN. Subjects with FEV1/FVC < 0.7 and >LLN have less obstruction, less severity and more comorbidity, suggesting the possibility of overdiagnosis or misdiagnosis. On the other hand, younger age at the time of diagnosis, higher tobacco consumption and more severe obstruction are related with FEV1/FVC >0.70 and < LLN (group 1).