Duration and Frequency of Spirometry Needed to Accurately Reflect Annualized Change of FEV1 in Chronic Obstructive Pulmonary Disease
{{output}}
Rationale: The slope of decline in forced expiratory volume in 1 second (FEV1) is commonly used to reflect the rate of disease progression for descriptive studies and therapeutic trials in chronic obstructive pulmonary disease (COPD). The frequency and duratio... ...
