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Patient characteristics.
| Number | Percent | ||
|---|---|---|---|
| Sex | Male | 15 | 35.7% |
| Female | 27 | 64.3% | |
| Age | Mean ± SD | 67 ± 14 | |
| Diagnosis | Pulmonary hypertension | 14 | 33.3% |
| Lung carcinoma | 10 | 23.8% | |
| Pulmonary embolism | 5 | 11.9% | |
| Systemic lupus erythematosus | 2 | 4.7% | |
| Chest pain | 2 | 4.7% | |
| Others | 9 | 21.4% |
*Others: Pulmonary fibrosis, hypoxia, congestive heart failure, aortic dissection, pulmonary arteriovenous malformation, hepatopulmonary syndrome, shortness of breath, hypoplastic right ling, normal.
