Fig 1.
After 6 seconds of exhalation the chronometer turns green.
Table 1.
Mean values and differences of parameters determined by conventional spirometer and Air Smart Spirometer.
Table 2.
Concordance and correlation between the parameters measured by the Air Smart Spirometer and the conventional spirometer.
Fig 2.
Bland and Altman graphs.
Fig 3.
Correlation graphs.
Table 3.
Contingency table of the number of subjects diagnosed with obstruction by conventional spirometer and using the Air Smart Spirometer device.