| CHF mean (%) N = 16 | COPD mean (%) N = 9 | Chest pain mean (%) N = 15 | Overall mean (%) N = 40 | |
| Mean age, years (range) | 75 (56–91) | 69 (53–83) | 63 (53–83) | 69 (53–91) |
| Male gender | 10 (63) | 4 (44) | 10 (67) | 24 (60) |
| Vitals on arrival | ||||
| Temperature (°C) | 36.2 | 36.7 | 35.9 | 36.2 |
| Heart rate (beats/min) | 91 | 89 | 75 | 85 |
| Respiratory rate (breaths/min) | 20 | 25 | 18 | 20 |
| Systolic blood pressure (mm Hg) | 147 | 147 | 143 | 146 |
| SaO2 on room air (%) (N = 16; 9; 14; 39) | 96 | 96 | 98 | 97 |
| Support | ||||
| Home oxygen | 3 (19) | 1 (11) | 1 (6.7) | 5 (13) |
| Past medical history | ||||
| Coronary artery bypass graft and/or angioplasty | 9 (56) | 2 (22) | 7 (47) | 18 (45) |
| CHF | 16 (100) | 1 (11) | 1 (7) | 18 (45) |
| Previous myocardial infarction | 7 (44) | 1 (44) | 7 (47) | 18 (45) |
| COPD | 0 (0) | 9 (100) | 1 (7) | 10 (25) |
| Lung and/or other cancers | 2 (13) | 1 (11) | 0 (0) | 3 (8) |
| Walk test | ||||
| Completed walk test | 11 (69) | 8 (89) | 15 (100) | 34 (85) |
| Duration of walk test, minutes (mean) | 2.8 | 2.9 | 3.0 | 2.9 |
| Poor clinical outcome | 8 (50) | 4 (44) | 0 (0) | 12 (30) |
| Admitted to hospital | 4 (25) | 2 (22) | 0 (0) | 6 (15) |
| BiPAP required | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| Intubation required | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| Myocardial infarction | 0 (0) | 1 (11) | 0 (0) | 1 (3) |
| Relapse* | 4 (25) | 2 (22) | 0 (0) | 6 (15) |
| Deceased | 0 (0) | 1 (11) | 0 (0) | 1 (3) |
*Relapse is defined as return to hospital within 14 days due to worsening of either respiratory or cardiac symptoms. BiPAP, biphasic positive airway pressure; CHF, congestive heart failure; COPD, chronic obstructive pulmonary disease; SaO2, arterial oxygen saturation.