CTEPH(n = 257) | IPAH(n = 276) | Control(n = 180) | |
---|---|---|---|

CTEPH, chronic thromboembolic pulmonary hypertension; IPAH, idiopathic pulmonary arterial hypertension; CI, confidence interval. | |||

*p<0.01 IPAH v control groups (χ^{2} or unpaired Student’s t tests, as appropriate). | |||

†p<0.05 CTEPH v control groups (χ^{2} test). | |||

Sex ratio (F:M) | 0.9:1 | 1.5:1† | 0.8:1 |

Mean (SD) age (years) | 51 (14)* | 46 (15) | 47 (9) |

No (%) of patients with splenectomy (with 95% CI) | 22 (8.6%)*(5.2 to 12) | 7 (2.5%)(0.7 to 4.4) | 1 (0.6%)(0.0 to 1.6) |