Table 1.
Baseline Characteristics of the Study Population
| COPD Patients with Estimated eSPAP | COPD Patients Without Estimated eSPAP | p-value | |
|---|---|---|---|
| N = 183 | N=115 | ||
| Age, years | 74 (67–79) | 72(67–77) | 0.07 |
| Sex, female, n (%) | 23 (12.6) | 8(7.0) | 0.36 |
| Smoking index, pack-years | 46.5 (35.3–70.1) | 51(38–76.1) | 0.64 |
| Current smokers, n (%) | 17 (9.3) | 17(15.0) | 0.09 |
| FEV1/FVC, % | 55.2 (42.3–64.2) | 53.6(44.4–62.6) | 0.94 |
| %FEV1, % | 66.7 ± 21.7 | 58.2 ± 21.0 | 0.03 |
| COPD gradea 1/2/3/4, n (%) | 56/84/34/9 (30.6/45.9/18.6/4.9) | 17/55/31/12 (14.8/47.8/27.0/10.4) | 0.09 |
Notes: Data are presented as the mean ± SD, median (IQR), or number (%). aDefined by the Global Initiative for Chronic Obstructive Lung Disease.
Abbreviations: PH, pulmonary arterial hypertension; FEV1, forced expiratory volume in 1 second; FVC, forced vital capacity; %FEV1, forced expiratory volume in 1 second as a percentage of the predicted forced expiratory volume in 1 second; GOLD, Global Initiative for Chronic Obstructive Lung Disease; SD, standard deviation; IQR, interquartile range.