Baseline data of the participants, according to the presence or absence of an electrocardiographic major abnormality
| All n=2451 | With major ECG abnormality n=521 | Without major ECG abnormality n=1930 | P value | |
| Age (years) | 58.0 (16.1) | 64.44 (14.9) | 57.22 (15.1) | – |
| Male sex | 1488 (60.7) | 324 (62.2) | 1164 (60.3) | 0.44 |
| Country | 0.09 | |||
| LIC | 185 (7.5) | 26 (5) | 159 (8.2) | |
| LMIC | 1497 (61.1) | 324 (62.2) | 1173 (60.8) | |
| UMIC | 375 (15.3) | 86 (16.5) | 289 (15.0) | |
| HIC | 394 (16.1) | 85 (16.3) | 309 (16) | |
| Non-HIC | 2057 (83.9) | 436 (83.7) | 1621 (84) | 0.87 |
| Hypertension | 1189 (48.5) | 320 (61.4) | 869 (45) | <0.01 |
| Diabetes | 895 (36.5) | 223 (42.8) | 672 (34.8) | <0.01 |
| CVD | 289 (11.8) | 130 (25) | 159 (8.2) | <0.01 |
| CKD | 195 (8.0) | 62 (11.9) | 133 (6.9) | <0.01 |
| Smoking | 110 (4.5) | 23 (4.4) | 87 (4.5) | 0.93 |
| Asthma | 88 (3.6) | 18 (3.5) | 70 (3.6) | 0.85 |
| Chronic immunodeficiency | 80 (3.3) | 26 (5) | 54 (2.8) | 0.01 |
| Cancer | 58 (2.4) | 15 (2.9) | 43 (2.2) | 0.39 |
Data are present as mean (SD) or number (%).
CKD, chronic kidney disease; CVD, cardiovascular disease; HIC, high-income countries; LIC, low-income countries; LMIC, lower middle-income countries; UMIC, upper middle-income countries.