Table 1.
Baseline characteristics of NSTEMI patients in analytical cohort by country income classification
| Total | LLMICs | UMICs | HICs | Missing data, | |
|---|---|---|---|---|---|
| (n = 2947) | (n = 361) | (n = 825) | (n = 1761) | n (%) | |
| Patient characteristics | |||||
| Age (years), median (IQR) | 66 (57–75) | 58 (51–65) | 64 (56–73) | 68 (59–77) | 0 |
| >= 75 years | 761 (25.8) | 31 (8.6) | 177 (21.5) | 553 (31.4) | 0 |
| >= 80 years | 447 (15.2) | 16 (4.4) | 93 (11.3) | 338 (19.2) | 0 |
| Women | 907 (30.8) | 122 (33.8) | 259 (31.4) | 526 (29.9) | 0 |
| Ethnic origin | 107 (3.6) | ||||
| Caucasian | 2252 (79.3) | 142 (43.2) | 553 (69.6) | 1557 (90.7) | |
| Black | 41 (1.4) | 31 (9.4) | 0/795 | 10 (0.6) | |
| Asian | 278 (9.8) | 129 (39.2) | 88 (11.1) | 61 (3.6) | |
| Other | 269 (9.5) | 27 (8.2) | 154 (19.4) | 88 (5.1) | |
| Cardiovascular risk factors | |||||
| Hypertension | 2023 (69.0) | 235 (65.3) | 597 (72.9) | 1191 (67.9) | 15 (0.5) |
| Ever smoker | 1591 (56.9) | 159 (45.6) | 456 (56.6) | 976 (59.4) | 151 (5.1) |
| Current smoker | 857 (30.7) | 128 (36.7) | 297 (36.9) | 432 (26.3) | |
| Former smoker | 734 (26.3) | 31 (8.9) | 159 (19.8) | 544 (33.1) | |
| Diabetes Mellitus | 1104 (37.7) | 174 (48.6) | 332 (40.5) | 598 (34.2) | 19 (0.6) |
| Hypercholesterolaemia | 1427 (51.9) | 125 (39.4) | 324 (45.3) | 978 (57.0) | 200 (6.8) |
| Cardiovascular comorbidities | |||||
| Atrial fibrillation | 302 (10.3) | 13 (3.6) | 82 (10.0) | 207 (11.8) | 17 (0.6) |
| Heart failure | 464 (15.9) | 41 (11.5) | 163 (20.0) | 260 (14.9) | 30 (1.0) |
| Prior myocardial infarction | 759 (26.1) | 49 (13.7) | 277 (34.5) | 433 (24.8) | 41 (1.4) |
| Prior PCI | 649 (22.1) | 31 (8.6) | 209 (25.5) | 409 (23.3) | 14 (0.5) |
| Prior CABG surgery | 217 (7.4) | 9 (2.5) | 79 (9.6) | 129 (7.3) | 5 (0.2) |
| Peripheral vascular disease | 243 (8.6) | 12 (3.6) | 51 (6.6) | 180 (10.4) | 115 (3.9) |
| Stroke | 204 (6.9) | 19 (5.3) | 55 (6.7) | 130 (7.4) | 6 (0.2) |
| Relevant comorbidities | |||||
| Active malignancy | 82 (2.8) | 8 (2.2) | 9 (1.1) | 65 (3.7) | 37 (1.3) |
| COPD | 234 (8.0) | 27 (7.5) | 50 (6.1) | 157 (9.0) | 30 (1.0) |
| Chronic kidney disease | 367 (12.5) | 23 (6.4) | 108 (13.2) | 236 (13.5) | 16 (0.5) |
CABG, coronary artery bypass grafting; COPD, chronic obstructive pulmonary disease; HICs, high-income countries, LLMICs, low to lower-middle-income countries; PCI, percutaneous coronary intervention; UMICs, upper-middle-income countries.