Baseline characteristics and symptoms of presentation
| All (496) | Without infarction (353) | With infarction (143) | P value | |
| Gender (female) | 238 (48%) | 168 (48%) | 70 (49%) | 0.784 |
| Age, mean (±SD) | 58±16.9 | 61±16.6 | 52±15.9 | <0.001 |
| Race, n (%) | 0.017 | |||
| Black | 249 (50) | 168 (48) | 81 (57) | |
| White | 98 (20) | 81 (23) | 17 (12) | |
| Other | 149 (30) | 104 (30) | 45 (32) | |
| BMI, mean (±SD) | 31.8±9.3 | 31.8±9.5 | 32.0±8.7 | 0.421 |
| Symptoms at presentation, n (%) | ||||
| Dyspnoea | 297 (60) | 207 (59) | 90 (63) | 0.376 |
| Hypoxia | 237 (49) | 173 (50) | 64 (46) | 0.371 |
| Pleuritic chest pain | 114 (23) | 69 (20) | 45 (32) | 0.004 |
| DVT symptoms | 50 (10) | 40 (11) | 10 (7) | 0.146 |
| Syncope | 48 (10) | 40 (11) | 8 (6) | 0.05 |
| Haemoptysis | 21 (4) | 9 (3) | 12 (8) | 0.04 |
| Altered mental status | 38 (8) | 28 (8) | 10 (7) | 0.722 |
| Cardiac arrest | 22 (4) | 15 (4) | 7 (5) | 0.752 |
| Comorbidities, n (%) | ||||
| Cardiac diseases | 191 (39) | 148 (42) | 43 (30) | 0.014 |
| COPD/asthma | 71 (14) | 54 (15) | 17 (12) | 0.326 |
| CKD | 49 (10) | 42 (12) | 7 (5) | 0.018 |
| Diabetes mellitus | 115 (23) | 91 (26) | 24 (17) | 0.032 |
| Hypothyroidism | 36 (7) | 31 (9) | 5 (4) | 0.039 |
| Malignancy | 111 (22) | 88 (25) | 23 (16) | 0.032 |
| Recent surgery | 68 (14) | 52 (15) | 16 (11) | 0.299 |
| Current anticoagulation | 59 (12) | 41 (12) | 18 (13) | 0.762 |
BMI, body mass index; CKD, chronic kidney disease; COPD, chronic obstructive pulmonary disease; DVT, deep vein thrombosis; n, number; SD, standard deviation.