Table 2.
Predictive factors in 28-day survival rate in early patients with acute myocardial infarction in Isfahan
| Variables | The number of patients alive at 28-day after the first MI (%) | The number of deaths occurred in the first 28-day after MI | Survival rates at 28-day after the occurrence of the disease (%) | HR for death in the first 28-day after a first MI with 95% CI (unadjusted) | HR for death in the first 28-day after a first MI with 95% CI (adjusted)* |
|---|---|---|---|---|---|
| Sex | |||||
| Male | 3571 | 106 | 97.0 | - | - |
| Female | 586 | 34 | 94.2 | 1.98 (1.34-2.91) | 1.97 (1.32-2.92) |
| Age group (year) | |||||
| 39 year and lower | 440 | 6 | 98.6 | - | - |
| 40-44 | 739 | 15 | 98.0 | 1.49 (0.57-3.84) | 1.46 (0.56-3.79) |
| 45-49 | 1124 | 38 | 96.6 | 2.49 (1.05-3.84) | 2.71 (1.14-6.44) |
| 50-55 | 1854 | 81 | 95.6 | 3.24 (1.41-7.42) | 3.43 (1.49-7.92) |
| Streptokinase | |||||
| Receiving | 2509 | 77 | 96.9 | - | - |
| Not receiving | 1648 | 63 | 96.2 | 1.24 (0.89-1.74) | 1.01 (0.71-1.46) |
| ICD-10 | |||||
| Acute subendocardial MI | 331 | 2 | 99.4 | - | - |
| Acute transmural MI of other sites | 103 | 5 | 95.1 | 8.18 (1.58-42.20) | 8.70 (1.66-45.63) |
| Acute transmural MI of inferior wall | 1334 | 25 | 98.1 | 3.12 (0.73-13.17) | 3.38 (0.77-14.75) |
| Acute transmural MI of anterior wall | 1420 | 39 | 97.3 | 4.59 (1.10-19.00) | 4.92 (1.15-21.06) |
| AMI, unspecified | 932 | 64 | 93.1 | 11.70 (2.86-47.80) | 11.62 (2.79-48.33) |
| Acute transmural MI of unspecified site | 37 | 5 | 86.5 | 24.18 (4.69-124.66) | 22.42 (4.24-118.37) |
| Symptoms | |||||
| Typical | 3542 | 112 | 96.8 | - | - |
| Atypical | 477 | 17 | 96.4 | 1.12 (0.67-1.88) | 0.99 (0.59-1.67) |
| Others | 128 | 10 | 92.2 | 2.52 (1.32-4.81) | 2.11 (1.08-4.10) |
| Miss | 10 | 1 | 90.0 | 3.35 (0.46-24.03) | 0.54 (0.06-4.28) |
| Cardiac enzymes | |||||
| Others | 384 | 9 | 97.7 | - | - |
| Typical | 3189 | 93 | 97.1 | 1.24 (0.62-2.47) | 1.40 (0.69-2.80) |
| Atypical | 478 | 20 | 95.8 | 1.80 (0.82-3.96) | 1.93 (0.87-4.26) |
| Not clear | 106 | 18 | 83.0 | 7.96 (3.57-17.73) | 7.27 (3.22-16.4) |
| EKG | |||||
| Ischemic | 675 | 16 | 97.6 | - | - |
| Probable | 80 | 7 | 91.2 | 3.79 (1.55-9.21) | 3.37 (1.36-8.36) |
| Other | 39 | 1 | 97.4 | 1.07 (0.14-8.07) | 1.03 (0.13-7.90) |
| Definite | 3268 | 102 | 96.9 | 1.32 (0.78-2.23) | 1.60 (0.91-2.81) |
| Impossible coding | 50 | 10 | 80.0 | 9.59 (4.35-21.13) | 6.73 (2.96-15.30) |
| Miss | 45 | 4 | 91.1 | 3.90 (1.30-11.67) | 5.57 (1.81-17.10) |
*
Every variable adjusted for other variables;
ICD: International Classification of Disease; AMI: Acute myocardial infarction; EKG: Electrokardiogram; HR: Hazard ratio; CI: Confidence interval