Table 1.
Mortality analysis: baseline characteristics of study population, stratified by age and education
| Overall | age ≤75 | age > 75 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Level of education | Level of education | Level of education | |||||||||||||
| All | Low | Mid | High | p | All | Low | Mid | High | p | All | Low | Mid | High | p | |
| Number | 23,402 | 12,613 | 6667 | 4122 | 12,409 | 4128 | 4924 | 3357 | 10,993 | 8485 | 1743 | 765 | |||
| % | 100 | 53.9 | 28.5 | 17.6 | 100 | 33.3 | 39.7 | 27.0 | 100 | 77.2 | 15.9 | 7.0 | |||
| Demographic variables | |||||||||||||||
| Age in years | 71.7 | 78.0 | 65.6 | 62.4 | * | 61.6 | 66.6 | 59.9 | 57.9 | * | 83.2 | 83.6 | 81.7 | 81.9 | * |
| Male (%) | 63.6 | 53.4 | 73.2 | 79.4 | * | 76.1 | 68.3 | 78.5 | 82.2 | * | 49.9 | 46.1 | 57.9 | 66.8 | * |
| Clinical variables | |||||||||||||||
| Tumours (%) | 5.6 | 6.1 | 5.4 | 4.7 | * | 4.5 | 5.3 | 4.4 | 3.7 | * | 6.9 | 6.4 | 8.1 | 9.0 | * |
| Diabetes (%) | 8.8 | 10.9 | 7.5 | 4.4 | * | 6.2 | 9.0 | 5.8 | 3.3 | * | 11.7 | 11.8 | 12.2 | 9.4 | |
| Hematologic diseases (%) | 6.7 | 8.9 | 4.6 | 3.2 | * | 2.9 | 4.0 | 2.7 | 2.1 | * | 10.9 | 11.3 | 10.2 | 8.0 | * |
| Hypertensive diseases (%) | 14.3 | 17.3 | 12.0 | 8.9 | * | 9.4 | 11.7 | 9.1 | 6.9 | * | 19.9 | 20.0 | 20.4 | 17.5 | |
| Other forms of ischemic heart diseases (%) | 11.6 | 13.7 | 10.0 | 7.7 | * | 8.0 | 10.0 | 7.7 | 6.2 | * | 15.7 | 15.6 | 16.8 | 14.2 | |
| Previous heart failures (%) | 6.8 | 9.1 | 4.6 | 3.0 | * | 3.0 | 4.4 | 2.5 | 1.9 | * | 11.1 | 11.5 | 10.5 | 7.7 | * |
| Other cardiac conditions (%) | 2.6 | 3.2 | 2.0 | 1.9 | * | 1.4 | 2.0 | 1.2 | 0.9 | * | 4.1 | 3.8 | 4.2 | 6.3 | * |
| Conduction disorders and cardiac dysrhythmias (%) | 6.7 | 8.9 | 4.7 | 3.2 | * | 2.9 | 4.3 | 2.5 | 1.7 | * | 11.0 | 11.1 | 11.2 | 9.5 | |
| Cerebrovascular diseases (%) | 9.3 | 11.8 | 7.2 | 4.9 | * | 4.7 | 6.3 | 4.5 | 3.2 | * | 14.4 | 14.5 | 14.9 | 12.7 | |
| Vascular diseases (%) | 7.3 | 8.5 | 6.5 | 4.8 | * | 5.8 | 7.6 | 5.5 | 4.0 | * | 9.0 | 8.9 | 9.5 | 8.4 | |
| Chronic obstructive pulmonary disease (%) | 4.2 | 5.4 | 3.4 | 1.8 | * | 2.3 | 3.4 | 2.2 | 1.2 | * | 6.3 | 6.4 | 6.8 | 4.3 | |
| Chronic nephropathies (%) | 11.7 | 15.0 | 8.5 | 6.5 | * | 5.2 | 6.9 | 4.8 | 3.8 | * | 18.9 | 19.0 | 18.9 | 18.6 | |
| NSTEMI (%) | 53.9 | 58.9 | 48.9 | 46.7 | * | 47.4 | 53.8 | 44.6 | 43.5 | * | 61.3 | 61.4 | 60.9 | 60.5 | |
| Previous AMI episodes (%) | 9.4 | 10.0 | 9.2 | 7.9 | * | 8.1 | 8.8 | 8.0 | 7.3 | * | 10.9 | 10.6 | 12.6 | 10.3 | |
| 30-day mortality (%) | 7.0 | 9.8 | 4.3 | 2.8 | * | 2.5 | 3.5 | 2.4 | 1.6 | * | 12.1 | 13.0 | 9.8 | 8.2 | * |
p < 0.05 in test for trend between levels of education
Low education = no middle school diploma, mid education = middle school diploma, and high education = high school diploma or more