Entire Cohort, Median [IQR] or % (n/N) | Obstructive, Median [IQR] or % (n/N) | Restrictive, Median [IQR] or % (n/N) | Mixed, Median [IQR] or % (n/N) | P | |
---|---|---|---|---|---|

Distribution | — | 51% (56/110) | 9% (10/110) | 40% (44/110) | — |

Crs, % predicted | 69 [49–93] | 73 [52–96] | 64 [48–69] | 67 [47–89] | .24 |

FVC, % predicted | 77 [62–93] | 89 [75–106] | 61 [60–67]^{a} | 70 [60–81]^{a} | <.001 |

FEV_{0.5}, % predicted | 46 [39–57] | 43 [35–53] | 59 [57–62]^{b} | 46 [40–57]^{c} | .002 |

FEV_{0.5} and/or FVC, % predicted | 64 [48–79] | 49 [39–69] | 94 [91–97]^{a} | 69 [59–79]^{b}^{,}^{c} | <.001 |

FEF_{50%}, % predicted | 20 [11–42] | 12 [8–21] | 74 [53–90]^{a} | 24 [15–42]^{b}^{,}^{d} | <.001 |

FEF_{75%}, % predicted | 13 [7–26] | 8 [6–16] | 49 [40–82]^{a} | 16 [9–25] | <.001 |

FEF_{85%}, % predicted | 11 [7–22] | 8 [6–15] | 42 [34–58]^{a} | 14 [8–19.7]^{b}^{,}^{d} | <.001 |

FEF_{25%–75%}, % predicted | 16 [9–36] | 11 [7–18] | 71 [55–82]^{a} | 21 [13–36]^{b}^{,}^{d} | <.001 |

TLC, % predicted | 91 [76–120] | 120 [106–138] | 72 [67–78]^{b} | 78 [68–84]^{b} | <.001 |

FRC, % predicted | 101 [67–144] | 141 [104–173] | 69 [53–96]^{b} | 67 [59–92]^{b} | <.001 |

RV, % predicted | 110 [73–169] | 165 [122–189] | 75 [63–112]^{b} | 72 [55–97]^{b} | <.001 |

FRC and/or TLC, % predicted | 114 [101–137] | 127 [108–145] | 108 [93–129]^{b} | 109 [95–121]^{b} | .002 |

RV and/or TLC, % predicted | 121 [105–150] | 134 [119–162] | 116 [105–146]^{b} | 109 [94–133]^{a} | <.001 |

Degree of restriction (mild or moderate) | 49% (54/110) | 0% (0/56) | 100% (10/10)^{a} | 100% (44/44)^{a} | <.001 |

Degree of obstruction (moderate or severe) | 75% (82/110) | 86% (48/56) | 0% (0/10)^{a} | 78% (34/44)^{d} | <.001 |

BDR^{e} | 66% (61/93) | 74% (35/47) | 25% (2/8)^{b} | 63% (24/38) | .02 |

*N*= 56, 10, and 44, respectively, for all data except Crs, for which*N*= 48, 5, and 32, respectively. Symbols refer to*P*values from Dunn’s post hoc test or direct comparisons using the χ^{2}test. FEF_{25%–75%}, forced expiratory flow midexpiratory phase; FEF_{50%}, forced expiratory flow 50; FEF_{75%}, forced expiratory flow 75; FEF_{85%}, forced expiratory flow 85; FRC, functional residual capacity; RV, residual volume; —, not applicable.↵a Different from obstructive;

*P*< .001.↵b Different from obstructive;

*P*< .05.↵c Different from restrictive;

*P*< .05.↵d Different from restrictive;

*P*< .001.↵e

*P*value refers to the result of 1-way analysis of variance or a χ^{2}test comparing all 3 groups.