Table 1 Baseline demographic and clinical characteristics
From: Machine learning for ECG diagnosis and risk stratification of occlusion myocardial infarction
Derivation and testing cohort (n = 4,026) | External validation cohort (n = 3,287) | |
|---|---|---|
Age (years) | 59 ± 16 (18−102) | 60 ± 15 (21−100) |
Sex | ||
Male | 2,122 (53%) | 1,814 (55%) |
Female | 1,904 (47%) | 1,473 (45%) |
Race | ||
White | 1,698 (42%) | 1,326 (40%) |
Black | 1,328 (33%) | 1,544 (47%) |
Others | 52 (1.3%) | 40 (1%) |
Unknown | 948 (24%) | 377 (12%) |
Ethnicity | ||
Not Hispanic | 3,043 (76%) | 2,850 (87%) |
Hispanic / Latino | 19 (1%) | 116 (3.5%) |
Unknown | 964 (23%) | 321 (9.5%) |
Past medical history | ||
Hypertension | 2,767 (69%) | 2,090 (64%) |
Diabetes | 1,146 (29%) | 1,067 (33%) |
High cholesterol | 1,520 (38%) | 1,376 (42%) |
Current smoker | 1,244 (31%) | 802 (25%) |
Known CAD | 1,388 (35%) | 964 (30%) |
Prior myocardial infarction | 930 (23%) | 929 (29%) |
Prior PCI | 963 (24%) | 134 (4%) |
Prior CABG | 357 (10%) | 470 (14%) |
ECG and laboratory findings | ||
Sinus rhythm | 3,496 (87%) | 2,614 (80%) |
Atrial fibrillation | 354 (9%) | 352 (11%) |
Left BBB | 94 (2.3%) | 114 (3.5%) |
Right BBB | 237 (5.9%) | 215 (6.6%) |
ECG-LVH | 383 (9.5%) | 467 (14.2%) |
cTnI positive (initial) | 330 (8.2%) | 736 (22.4%) |
cTnI positive (serial testing) | 729 (18.1%) | 1,177 (35.8%) |
Medical therapy | ||
PCI (any stent) | 300 (7.5%) | 245 (7.5%) |
Emergent PCI (<90 min) | 144 (3.6%) | 157 (4.8%) |
Total LAD occlusion | 91 (2.3%) | 94 (2.9%) |
Total LCX occlusion | 63 (1.6%) | 88 (2.7%) |
Total RCA occlusion | 101 (2.5%) | 102 (3.1%) |
CABG | 34 (0.8%) | 30 (0.9%) |
Study outcomes | ||
Confirmed ACS | 550 (13.7%) | 537 (16.3%) |
OMI | 210 (5.2%) | 209 (6.4%) |
Other acute myocardial infarction (NOMI) | 240 (6.0%) | 220 (6.7%) |
Unstable angina | 100 (2.5%) | 108 (3.3%) |
30-d cardiovascular death | 137 (3.4%) | 111 (3.4%) |
