Table 3 Ability of the individual components and composite scores to differentiate exacerbation onset days from all other days.

Heart Rate

0.819

0.754-0.884

0.004

Oxygen Saturation

0.712

0.557-0.866

0.053

Peak-Expiratory Flow (PEF)

0.805

0.655-0.956

0.005

Oximetry Score

0.849

0.787-0.912

0.001

Oximetry-PEF Score

0.897

0.839-0.955

<0.001