Lung volume measure | β_{0} | β_{1} (SE) | β_{2} (SE) | β_{3} (SE) | β_{4} (SE) | β_{5} (SE) | RSD | R^{2} |
---|---|---|---|---|---|---|---|---|

FEV_{1}, FEV_{0.5}=forced expiratory volume in 1 or 0.5 seconds; FVC=forced vital capacity; PEF=peak expiratory flow; RSD=residual standard deviation; R^{2}=explained fraction of variance; SE=standard error of regression parameter. Slopes β_{1}, β_{2} and β_{3} represent the change per unit change in the respective explanatory variable. Coefficients β_{4} and β_{5} give the difference between two groups. | ||||||||

FEV_{0.5} (l) | –0.84 | 0.0119 (0.0013) | 0.0105 (0.0024) | 0.0044 (0.0009) | 0.038 (0.012) | 0.026 (0.011) | 0.13 | 0.59 |

FEV_{1} (l) | –1.33 | 0.0161 (0.0017) | 0.0152 (0.0029) | 0.0057 (0.0011) | 0.062 (0.015) | 0.046 (0.014) | 0.17 | 0.64 |

FVC (l) | –1.57 | 0.0171 (0.0019) | 0.0169 (0.0033) | 0.0072 (0.0012) | 0.058 (0.017) | 0.058 (0.015) | 0.19 | 0.64 |

PEF (l/s) | –2.21 | 0.0289 (0.0047) | 0.0238 (0.0082) | 0.0217 (0.0030) | 0.114 (0.042) | 0.052 (0.038) | 0.47 | 0.53 |