Non-inferiority of Portable Versus Desktop Spirometry

Non-inferiority of PEF between AioCare and CPFS/D USB Spirometer,Non-inferiority of FEV1 between AioCare and CPFS/D USB Spirometer,Non-inferiority of FVC between AioCare and CPFS/D USB Spirometer

The investigators compared the ventilation parameters for volume and flow obtained from
 standard spirometry procedures from patients presently monitored and treated for asthma or
 chronic obstructive pulmonary disease (COPD) using AioCare (HealthUp Sp. z o.o., Serial
 Number: MS082017005412, software version: MySpiroo app 1.1.14) as the tested device and
 Spirometer USB CPFS/D (MGC Diagnostics) as the reference, which required calibration prior to
 each session. Spirometry measurements were performed on sixty-two patients (forty-four
 females (58±17 years old) and eighteen males (52±19 years old)) at the Institute of
 Tuberculosis and Lung Disease in Warsaw, Poland. Participants were asked to perform correct
 spirometry examinations (which means at least three technically correct exhales and meeting
 repeatability criteria for FEV1 and FVC) on both measuring devices with a five-minute break
 between devices to prevent respiratory muscle fatigue. The highest value from all acceptable
 spirometry results was then used for analysis. All spirometry examinations followed ERS/ATS
 standards.