Overall characteristics
| 14 October 2019–30 December 2019 | 13 January 2020–27 March 2020 | 27 March 2020–22 May 2020 | |
| Total | 179 | 182 | 153 |
| Female | 59 (33%) | 71 (39.9%) | 51 (33.3%) |
| Presenting complaint | 153 chest pain (85.5%) 26 dyspnoea (14.5%) | 151 chest pain (83%) 6 dyspnoea (3%) 25 chest pain/dyspnoea (14%) | 131 chest pain (85.6%) 8 dyspnoea (5.2%) 14 chest pain/dyspnoea (9.2%) |
| Age | 62.6 (55.7–71.8) | 59 (50–70) | 59 (50–70) |
| Length of stay (days) | 2.66 (0.96–4.92) | 2.16 (1.2–5.1) | 1.71 (1–3.3) |
| Family history | 84 (46.9%) | 41 (22.5%) | 40 (26.1%) |
| Hypertension | 100 (55.9%) | 85 (46.7%) | 60 (39.2%) |
| Diabetes mellitus | 31 (17.3%) | 20 (11%) | 12 (7.8%) |
| Smoker | 49 current (27.4%) 66 ex (36.9%) 64 never (35.7%) | 46 current (25.3%) 61 ex (33.5%) 75 never (41.2%) | 38 Current (25%) 53 ex (34.9%) 62 never (40.1%) |
| Dyslipidaemia | 94 (52.5%) | 97 (53.3%) | 71 (46.4%) |
| History of cardiovascular/cerebrovascular disease | 74 (41.3%) | 67 (36.8%) | 50 (32.7%) |
| Systolic blood pressure | 126 (110–114) | 136 (121–153) | 144 (125–156) |
| Diastolic blood pressure | 74 (66–81.5) | 81 (72–89) | 82 (74–89) |
| Heart rate | 70 (64–79) | 76 (66–86) | 72 (65–84) |
| Weight (kg) | 78 (69.9–90.9)* | 80 (70–89.4)* | 80.5 (73.8–93.5)* |
| New ECG ischaemia | 63 (35.2%) | 36 (19.8%) | 22 (14.3%) |
| Troponin-T (ng/L) | 15 (0–44) | 0 (0–21.5) | 0 (0–20) |
| eGFR (ml/min/1.73m2) | 84 (67–99) | 90 (75–107) | 89 (72–103) |
| CTCA amount | 14 (7.8%) | 28 (15.4%) | 31 (20.3%) |
| Exercise stress test | 43 (24%) | 47 (25.8%) | 0 (0%) |
| Invasive coronary angiography | 82 (45.8%) | 71 (39%) | 52 (33.9%) |
| Revascularisation performed | 53 (29.6%) | 29 (15.9%) | 25 (16.3%) |
| Death at 1 month | 6 (3.4%) | 1 (0.5%) | 2 (1.3%) |
| Myocardial infarction at 1 month | 0 | 1 | 1 |
| Outpatient functional/anatomical imaging | Total 23 (12.8%) 9 invasive coronary angiogram (39%) 4 stress perfusion cardiac MRI (17.4%) 4 dobutamine stress echocardiography (17.4%) 3 single-photo emission CT (13.1%) 3 CTCA (13.1%) | Total 28 (15.4%) 10 stress perfusion cardiac magnetic resonance imaging (35.7%) 6 Invasive coronary angiogram (21.4%) 5 CTCA (18%) 4 single-photo emission CT (14%) 3 dobutamine stress echocardiography (10.9%) | Total 26 (16.9%) 11 CTCA (42.3%) 9 invasive coronary angiogram (34.6%) 4 Stress perfusion cardiac magnetic resonance imaging (15.4%) 1 dobutamine stress echocardiography (3.85%) 1 single-photo emission CT (3.85%) |
*Weight: not available=36 in cohort 1, 39 in cohort 2, 50 in cohort 3.
CTCA, CT coronary angiography; eGFR, estimated glomerular filtration rate.