Controls | Rhinitis | Asthma | p-value controls–rhinitis | p-value controls–asthma | p-value rhinitis–asthma | |

FEV_{1} % pred | 104.9±11.4 | 103.7±13.2 | 98.9±12.1 | 0.804 | 0.153 | 0.190 |

F_{eNO} ppb | 9.9 (6.1–16) | 36.2 (19.3–68.1) | 43.2 (19.4–96.5) | <0.001 | <0.001 | 0.359 |

S_{He} %·L^{−1} | 1.28±0.54 | 1.34±0.62 | 2.29±1.96 | 0.774 | 0.027 | 0.058 |

S_{SF6} %·L^{−1} | 1.84±0.94 | 2.21±0.96 | 2.83±1.05 | 0.108 | 0.004 | 0.232 |

Data are presented as mean±sd or geometric mean (geometric interval) (geometric mean is antilog(mean) and geometric interval is (antilog(mean–sd) – antilog(mean+sd)) of the log-transformed *F*_{eNO}), unless otherwise stated. FEV_{1}: forced expiratory volume in 1 s; S: slope; He: helium; SF_{6}: sulfur hexafluoride.