R_{FV} | R_{Q} | |||

r | p-value | r | p-value | |

LCI lung turnover | 0.76 | <0.0001^{#} | 0.85 | <0.0001^{#} |

S_{cond} L^{−}^{1} | 0.55 | 0.0003^{#} | 0.62 | <0.0001^{#} |

S_{acin} L^{−1} | 0.49 | 0.0013^{#} | 0.44 | 0.0049 |

FEV_{1} z-score | −0.64 | <0.0001^{#} | −0.67 | <0.0001^{#} |

FVC z-score | −0.57 | <0.0001^{#} | −0.62 | <0.0001^{#} |

RV/TLC % | 0.54 | 0.0003^{#} | 0.59 | 0.0001^{#} |

Data are presented as Spearman correlation coefficients; for all correlations we performed a Bonferroni correction: 0.05/12, as appropriate. *R*_{FV}: impairment of ventilation; *R*_{Q}: impairment of perfusion; LCI: lung clearance index; *S*_{cond} and *S*_{acin}: normalised phase III slope indices (see main text and supplementary material for explanation); FEV_{1}: forced expiratory volume in 1 s; FVC: functional vital capacity; RV: residual volume; TLC: total lung capacity. Correlation between *R*_{FV} and *R*_{Q} from functional MRI (matrix pencil decomposition MRI) and different lung function outcomes: LCI, *S*_{cond}, *S*_{acin}, FEV_{1}, FVC and RV/TLC ratio. ^{#}: p-values <0.0042 were considered statistically significant.