Baseline characteristics of patients admitted to hospitals in Ontario with AMI between 1992 and 1999
| Year of presentation | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Characteristic | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | p Value |
| *Derived from the International classification of diseases, ninth revision, codes in the 15 secondary diagnostic fields of the Canadian Institute for Health Information database. | |||||||||
| †Poor refers to patients with below median socioeconomic status. | |||||||||
| ‡Sick refers to patients with above median illness severity (predicted 30 day mortality). | |||||||||
| CHF, congestive heart failure. | |||||||||
| Number of patients | 17404 | 17643 | 17617 | 17967 | 18848 | 18829 | 18888 | 19169 | 0.002 |
| Sociodemographics | |||||||||
| Median age (years) | 67.0 | 66.9 | 67.1 | 67.3 | 67.6 | 67.7 | 67.9 | 68.2 | <0.0001 |
| > 65 years old (%) | 59.8 | 60.4 | 60.5 | 61.2 | 62.4 | 62.6 | 62.6 | 62.8 | <0.0001 |
| Women (%) | 36.3 | 35.8 | 36.7 | 36.8 | 36.8 | 36.4 | 35.9 | 37.1 | 0.25 |
| Median neighbourhood income ($C) | 20009 | 20018 | 20009 | 20037 | 20041 | 20054 | 20043 | 20043 | 0.038 |
| Poor† (%) | 52.3 | 51.4 | 51.5 | 50.7 | 50.3 | 49.7 | 49.9 | 50 | <0.0001 |
| Clinical | |||||||||
| Shock (%) | 2.5 | 2.5 | 2.4 | 2.3 | 2.5 | 2.4 | 2.3 | 2.2 | 0.03 |
| CHF (%) | 19.3 | 19.4 | 20 | 19.7 | 21.5 | 21.5 | 22.1 | 22.8 | <0.0001 |
| Pulmonary oedema (%) | 1.4 | 1.4 | 1.4 | 1.3 | 1.2 | 1.2 | 1 | 1.3 | 0.0003 |
| Arrhythmias (%) | 13.6 | 13.7 | 14.5 | 13.9 | 15.1 | 14.4 | 14.6 | 15.5 | <0.0001 |
| Diabetes with complications (%) | 1.6 | 1.6 | 1.8 | 2 | 2.3 | 2.6 | 3.3 | 3.8 | <0.0001 |
| Malignancies (%) | 4.1 | 2.4 | 2 | 1.7 | 1.8 | 1.8 | 2.1 | 2.2 | <0.0001 |
| Cerebrovascular disease (%) | 4.2 | 3.7 | 3.9 | 4.2 | 4 | 4.4 | 4 | 4 | 0.39 |
| Acute renal failure (%) | 1.5 | 1.3 | 1.4 | 1.5 | 1.7 | 1.7 | 1.8 | 2.3 | <0.0001 |
| Chronic renal failure (%) | 2.1 | 1.9 | 2 | 2.1 | 2.8 | 2.8 | 3.5 | 4 | <0.0001 |
| Predicted 30 day mortality (%) | 10.2 | 10.0 | 10.2 | 10.2 | 10.2 | 10.2 | 10.2 | 10.2 | 0.14 |
| Sick‡ (%) | 50.6 | 49.9 | 50.6 | 50.8 | 52.6 | 52.5 | 53.2 | 54.3 | <0.0001 |
| Attending physician | |||||||||
| Non-cardiology attending (%) | 75.1 | 73.2 | 72.4 | 71.3 | 70.1 | 68.8 | 69 | 68 | <0.0001 |
| Hospital | |||||||||
| No revascularisation centre (%) | 88.5 | 88.9 | 89 | 89.4 | 88.7 | 90.2 | 92 | 95.9 | <0.0001 |