Patients with COPD have different levels of FENO50 depending on the COPD phenotype. FENO50 measurement provides better diagnostic accuracy than BT, with an optimal cut-off value of 19 ppb.
Patients with COPD have different levels of FENO50 depending on the COPD phenotype.FENO50 measurement provides better diagnostic accuracy than BT, with an optimal cut-off value of19 ppb.