Table 1.
Characteristics of patients with and without atherosclerotic risk factors and first myocardial infarctions: National Registry of Myocardial Infarction, 1994 to 2006
| Variable | Atherosclerotic Risk Factors at Presentation |
||||
|---|---|---|---|---|---|
| Smoking (n = 169,674 [31.3%]) |
Diabetes (n = 121,630 [22.4%]) |
Dyslipidemia (n = 151,849 [28.0%]) |
Hypertension (n = 283,215 [52.3%]) |
Family History of CHD (n = 151,595 [28.0%]) |
|
| Age (years) | 57.7 ± 11.0 | 67.4 ± 12.5 | 63.3 ± 12.5 | 68.5 ± 13.3 | 60.7 ± 12.5 |
| Women | 31.7% | 46.9% | 39.1% | 47.8% | 35.8% |
| Race/ethnicity | |||||
| White | 82.7% | 76.7% | 84.8% | 81.1% | 86.8% |
| Black | 9.1% | 10.9% | 5.9% | 9.7% | 6.0% |
| Hispanic | 3.4% | 6.0% | 3.4% | 3.6% | 2.8% |
| Asian | 1.4% | 2.9% | 2.3% | 2.3% | 1.1% |
| Other | 3.4% | 3.6% | 3.6% | 3.2% | 3.3% |
| Smoking | 100.0% | 21.7% | 33.1% | 25.2% | 40.9% |
| Diabetes mellitus | 15.5% | 100.0% | 24.9% | 28.7% | 18.9% |
| Dyslipidemia | 29.6% | 31.1% | 100.0% | 32.4% | 36.1% |
| Hypertension | 42.1% | 66.9% | 60.5% | 100.0% | 48.4% |
| Family history of CHD | 36.5% | 23.6% | 36.1% | 25.9% | 100.0% |
| Body mass index (kg/m2)* | 28.4 ± 6.2 | 30.2 ± 7.0 | 29.2 ± 6.1 | 28.8 ± 6.6 | 29.2 ± 6.2 |
| Underweight | 2.7% | 1.9% | 1.5% | 2.9% | 1.7% |
| Normal | 27.0% | 20.6% | 21.6% | 26.1% | 22.5% |
| 25–29.9 | 36.7% | 32.5% | 38.6% | 34.3% | 38.0% |
| 30–39.9 | 29.1% | 36.4% | 32.9% | 30.9% | 32.4% |
| ≥40 | 4.6% | 8.6% | 5.3% | 5.8% | 5.4% |
| ≥30 | 33.7% | 45.0% | 38.2% | 36.7% | 37.8% |
| Initial systolic blood pressure (mm Hg) |
142.7 ± 31.5 | 146.3 ± 33.7 | 146.7 ± 30.8 | 149.5 ± 33.8 | 146.4 ± 30.4 |
| Heart rate (beats/min) | 84.5 ± 22.9 | 90.8 ± 24.2 | 83.4 ± 22.0 | 87.5 ± 24.0 | 83.3 ± 21.8 |
| Symptom onset to arrival, hours | 5.3 ± 8.9 | 6.4 ± 10.1 | 5.6 ± 9.0 | 5.9 ± 9.5 | 5.6 ± 9.2 |
| Killip class | |||||
| I | 87.1% | 74.9% | 87.5% | 80.1% | 88.2% |
| II | 8.4% | 15.4% | 8.2% | 12.8% | 7.9% |
| III | 3.3% | 8.3% | 3.5% | 5.9% | 3.1% |
| IV | 1.2% | 1.4% | 0.8% | 1.1% | 0.8% |
| Initial electrocardiographic findings | |||||
| ST-segment elevation | 49.8% | 36.1% | 42.3% | 37.1% | 45.5% |
| ST-segment depression | 31.4% | 26.4% | 30.4% | 27.8% | 30.3% |
| Nonspecific | 26.7% | 33.9% | 30.1% | 32.9% | 29.4% |
| Q wave | 11.8% | 10.6% | 11.1% | 10.0% | 11.7% |
| Left bundle branch block | 2.0% | 5.0% | 2.8% | 4.4% | 2.6% |
| Myocardial infarction location | |||||
| Anterior/septal | 25.2% | 24.7% | 24.0% | 24.3% | 25.7% |
| Inferior | 41.8% | 30.0% | 37.1% | 31.1% | 38.5% |
| Posterior | 6.2% | 3.9% | 5.6% | 4.5% | 5.8% |
| Lateral | 13.8% | 12.2% | 13.1% | 12.7% | 13.8% |
| Right ventricle | 1.1% | 0.7% | 0.9% | 0.7% | 0.9% |
| Unspecified | 29.7% | 42.7% | 35.2% | 41.5% | 32.0% |
Data are expressed as mean ± SD or as percentages. For all comparisons, p <0.001.
*
Body mass index is available in NRMI 4 to 5.