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

Need for any O_{2} | 1.22 | 1.14–1.30 | <0.001 |

P_{pcw} per 1 mmHg increase above mean value for cohort | 1.19 | 1.16–1.21 | <0.001 |

FEV_{1} per 1% increase from mean value for cohort | 0.99 | 0.99–1.00 | 0.050 |

CI: confidence interval;

*P*_{pcw}: pulmonary capillary wedge pressure; FEV_{1}: forced expiratory volume in one second. The Hosmer–Lemeshow Goodness-of-Fit test yields a Chi-squared value of 14.8 (p = 0.06).^{#}: defined as mean pulmonary artery pressure between 25–40 mmHg. n = 2,296. 1 kPa = 0.133 mmHg.