Variable | Adjusted odds ratio | 95% CI | p-value |

P_{CO2} per 1-point increase | 0.92 | 0.89–0.96 | 0.0001 |

Age at listing | 0.95 | 0.92–0.97 | <0.0001 |

FEV_{1} per 1% increase from mean value for cohort | 0.96 | 0.93–0.99 | 0.003 |

P_{pcw} per 1 mmHg increase above mean value for cohort | 1.22 | 1.17–1.28 | <0.001 |

Any O_{2} needed | 1.29 | 1.12–1.49 | 0.004 |

O_{2} need >3 L·min^{−1} | 1.89 | 1.03–3.47 | 0.041 |

African-American | 1.93 | 1.02–3.66 | 0.043 |

^{#}: defined as mean pulmonary artery pressure >40 mmHg. CI: confidence interval;*P*_{CO2}: carbon dioxide tension; FEV_{1}: forced expiratory volume in one second;*P*_{pcw}: pulmonary capillary wedge pressure. The Hosmer–Lemeshow Goodness-of-Fit test yields a Chi-squared value of 7.2 (p = 0.51). n = 1,594. 1 kPa = 0.133 mmHg.