| Duration of Exposure | |
Pearson Correlation Coefficient | p Value | |
FEV1 | −0.032 | 0.765 |
FVC | −0.186 | 0.081 |
FEV1/FVC | −0.249 | 0.019* |
PEFR | 0.284 | 0.007* |
FEF25% - 75% | −0.038 | 0.723 |
SPO2 | 0.049 | 0.648 |
HR | −0.113 | 0.290 |
Carbon mono oxide | 0.152 | 0.155 |