Table 1.
Baseline Characteristics of the Study Population
| Control Group (n = 103,686) | AMI Group (n = 103,686) | SMD | |
|---|---|---|---|
| Age, y | 59.6 ± 10.3 | 59.6 ± 10.3 | 0 |
| Male | 80,966 (78.1) | 80,966 (78.1) | 0 |
| Urban residence | 88,178 (85.0) | 91,978 (88.7) | −0.109 |
| Low income | 21,597 (20.8) | 19,230 (18.5) | 0.039 |
| Comorbidities | |||
| Diabetes | 10,637 (10.3) | 51,059 (49.2) | 0.943 |
| Hypertension | 21,967 (21.2) | 81,168 (78.3) | 1.391 |
| Dyslipidemia | 7,584 (7.3) | 82,781 (79.8) | 2.144 |
| Chronic kidney disease | 22 (0.2) | 3,450 (3.3) | 0.238 |
| Ischemic stroke/TIA | 1,581 (1.5) | 7,951 (7.7) | 0.297 |
| COPD | 6887 (6.6) | 14959 (14.4) | 0.256 |
| Chronic liver disease | 7136 (6.9) | 14765 (14.2) | 0.241 |
| Obesity, BMI >25 kg/m2 | 35,428 (34.2) | 48,231 (46.5) | 0.254 |
| Smoking status | |||
| Current smoker | 18,379 (17.7) | 13,453 (13.0) | 0.260 |
| Former smoker | 33,754 (32.6) | 43,319 (41.8) | |
| Never smoker | 56,479 (54.5) | 41,988 (40.5) | |
| Heavy alcohol drinker | 9,173 (8.8) | 16,771 (16.2) | 0.223 |
| Regular exercise | 21,187 (20.4) | 8,922 (8.6) | −0.341 |
Values are mean ± SD or n (%).
AMI = acute myocardial infarction; BMI = body mass index; COPD = chronic obstructive pulmonary disease; SMD = standardized mean difference; TIA = transient ischemic attack.