Table 1 Patient characteristics and cardiac condition prevalence
From: Diagnosis of cardiac conditions from 12-lead electrocardiogram through natural language supervision
MIMIC-IV-ECG | LSAS-ECG | |||
|---|---|---|---|---|
Training n (%) | Validation n (%) | Internal testing n (%) | External validation n (%) | |
No. of patient | 129,081 | 16,135 | 16,136 | 45,151 |
No. of study | 638,376 | 80,974 | 80,684 | 45,151 |
Age | ||||
≤44 | 84,855 (13.3) | 10,982 (13.6) | 10,549 (13.1) | 9202 (20.4) |
45–74 | 355,090 (55.6) | 44,695 (55.2) | 45,722 (56.7) | 26,366 (58.4) |
≥75 | 194,844 (30.5) | 24,836 (30.7) | 23,972 (29.7) | 9528 (21.1) |
Missing study | 3587 (0.6) | 461 (0.6) | 441 (0.5) | 55 (0.1) |
range | 12–101 | 14–99 | 16–100 | 0–89 |
Sex | ||||
Male | 323,439 (50.7) | 41,801 (51.6) | 40,971 (50.8) | 25,453 (56.4) |
Female | 311,350 (48.8) | 38,712 (47.8) | 39,272 (48.7) | 19,676 (43.6) |
Missing | 3587 (0.6) | 461 (0.6) | 441 (0.5) | 22 (0.0) |
Cardiac conditions | ||||
Atrial fibrillation/flutter | 74,618 (11.7) | 9983 (12.3) | 9984 (12.4) | 9840 (21.8) |
Supraventricular tachycardia | 769 (0.1) | 114 (0.1) | 111 (0.1) | 724 (1.6) |
Sinus tachycardia | 55,327 (8.7) | 7002 (8.6) | 6931 (8.6) | 7254 (16.1) |
Sinus bradycardia | 78,828 (12.3) | 10,096 (12.5) | 10,325 (12.8) | 16,559 (36.7) |
Premature ventricular complex | 38,467 (6.0) | 4811 (5.9) | 4926 (6.1) | 294 (0.7) |
Premature atrial complex | 28,088 (4.4) | 3449 (4.3) | 3541 (4.4) | 1312 (2.9) |
Pacemaker rhythm | 11,563 (1.8) | 1569 (1.9) | 1300 (1.6) | Not applicable |
Atrioventricular block | 47,299 (7.4) | 6132 (7.6) | 5604 (6.9) | 1548 (3.4) |
1st degree atrioventricular block | 44,310 (6.9) | 5727 (7.1) | 5236 (6.5) | 1140 (2.5) |
Right bundle branch block | 53,288 (8.3) | 6202 (7.7) | 6411 (7.9) | 649 (1.4) |
Left bundle branch block | 23,735 (3.7) | 3209 (4.0) | 2749 (3.4) | 240 (0.5) |
Left ventricular hypertrophy | 67,505 (10.6) | 9079 (11.2) | 8429 (10.4) | 647 (1.4) |
ST-T change | 116,388 (18.2) | 15,331 (18.9) | 14,544 (18.0) | 1158 (2.6) |
Prolonged QT interval | 29,843 (4.7) | 3913 (4.8) | 3790 (4.7) | 394 (0.9) |
Low QRS voltage | 53,563 (8.4) | 6618 (8.2) | 6940 (8.6) | 1043 (2.3) |
General ECG classification | ||||
Normal ECG | 125,158 (19.6) | 15,810 (19.5) | 15,739 (19.5) | Not applicable |
Borderline ECG | 138,395 (21.7) | 17,006 (21.0) | 17,524 (21.7) | |
Abnormal ECG | 285,823 (44.8) | 37,167 (45.9) | 36,285 (45.0) | |
Missing | 89,000 (13.9) | 10,991 (13.6) | 11,136 (13.8) | |
