Table 3.
Predictive factors in 28-day survival rate in late 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 | 7279 | 650 | 91.1 | - | - |
| Female | 2990 | 437 | 85.4 | 1.68 (1.49-1.90) | 1.35 (1.19-1.53) |
| Age group (year) | |||||
| 50-59 | 2893 | 126 | 95.6 | - | - |
| 60-69 | 3381 | 311 | 90.8 | 2.16 (1.76-2.66) | 2.03 (1.64-2.50) |
| 70-79 | 3038 | 447 | 85.3 | 3.54 (2.91-4.32) | 2.88 (2.35-3.53) |
| 80 and higher | 957 | 203 | 78.8 | 5.26 (4.21-6.58) | 3.85 (3.06-4.84) |
| Streptokinase | |||||
| Receiving | 5118 | 497 | 90.3 | - | - |
| Not receiving | 5151 | 590 | 88.5 | 1.18 (1.05-1.33) | 1.09 (0.95-1.24) |
| ICD-10 | |||||
| Acute subendocardial MI | 979 | 26 | 97.3 | - | - |
| Acute transmural MI of other sites | 263 | 14 | 94.7 | 2.04 (1.06-3.92) | 1.67 (0.87-3.20) |
| Acute transmural MI of inferior wall | 2839 | 175 | 93.8 | 2.36 (1.56-3.56) | 1.73 (1.13-2.64) |
| Acute transmural MI of anterior wall | 3391 | 317 | 90.7 | 3.63 (2.43-5.41) | 2.81 (1.86-4.23) |
| AMI, unspecified | 2674 | 513 | 80.8 | 7.86 (5.30-11.65) | 5.40 (3.62-5.07) |
| Acute transmural MI of unspecified site | 123 | 42 | 65.9 | 15.24 (9.34-24.86) | 10.52 (6.41-17.28) |
| Symptoms | |||||
| Typical | 8461 | 829 | 90.2 | - | - |
| Atypical | 1202 | 124 | 89.7 | 1.05 (0.87-1.27) | 0.96 (0.79-1.16) |
| Others | 555 | 123 | 77.8 | 2.41 (1.99-2.91) | 1.52 (1.24-1.85) |
| Miss | 51 | 11 | 78.4 | 2.36 (1.30-4.28) | 1.61 (0.88-2.93) |
| Cardiac enzymes | |||||
| Atypical | 1344 | 104 | 92.3 | - | - |
| Typical | 7602 | 726 | 90.4 | 1.23 (1.08-1.52) | 1.29 (1.05-1.59) |
| Other | 896 | 77 | 91.4 | 1.12 (0.83-1.50) | 1.19 (0.88-1.60) |
| Not clear | 427 | 180 | 57.8 | 7.03 (5.52-8.95) | 5.17 (4.04-6.63) |
| EKG | |||||
| Other | 49 | 2 | 95.9 | - | - |
| Probable | 187 | 26 | 86.1 | 3.57 (0.84-15.05) | 2.27 (0.53-9.60) |
| Ischemic | 1721 | 110 | 93.6 | 1.56 (0.38-6.33) | 1.06 (0.26-4.32) |
| Definite | 7954 | 859 | 89.2 | 2.69 (0.67-10.79) | 2.07 (0.51-8.36) |
| Impossible coding | 208 | 50 | 76.0 | 6.46 (1.57-26.58) | 2.64 (0.64-10.89) |
| Miss | 150 | 40 | 73.3 | 7.58 (1.83-31.30) | 3.08 (0.74-12.83) |
*
Every variable adjusted for other variables;
ICD: International Classification of Disease; AMI: Acute myocardial infarction; EKG: Electrokardiogram; HR: Hazard ratio; CI: Confidence interval