Incidence rates, rate differences and adjusted incidence rate ratios (IRR) of myocardial infarction (MI)
| General population | Rheumatoid arthritis | Diabetes mellitus | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MI cases (n) | Time at risk (1000 py) | Incidence Rate | MI cases (n) | Time at risk (1000 py) | Incidence rate | Rate difference | IRR (CI) | MI cases (n) | Time at risk (1,000 py) | Incidence rate | Rate difference | IRR (CI) | |
| Women (years) | |||||||||||||
| Less than 50 | 2531 | 12 033 | 0.2 | 15 | 11.0 | 1.4 | 1.2 | 5.5 (3.3 to 9.2) | 91 | 64.8 | 1.4 | 1.2 | 5.9 (4.8 to 7.3) |
| 50–65 | 6777 | 4113 | 1.6 | 33 | 11.9 | 2.8 | 1.2 | 1.7 (1.2 to 2.3) | 388 | 79.3 | 4.9 | 3.3 | 2.6 (2.3 to 2.9) |
| More than 65 | 20 040 | 3002 | 6.7 | 96 | 10.1 | 9.5 | 2.8 | 1.4 (1.1 to 1.7) | 1,035 | 82.5 | 12.5 | 5.8 | 1.6 (1.5 to 1.7) |
| Men (years) | |||||||||||||
| Less than 50 | 9448 | 12 371 | 0.7 | 6 | 4.1 | 1.5 | 0.8 | 2.1 (1.0 to 4.2) | 342 | 81.5 | 4.2 | 3.5 | 4.9 (4.4 to 5.5) |
| 50–65 | 17 006 | 3779 | 4.5 | 50 | 5.3 | 9.4 | 4.9 | 2.0 (1.5 to 2.6) | 907 | 113.8 | 8.0 | 3.5 | 1.5 (1.4 to 1.7) |
| More than 65 | 20 068 | 1842 | 10.9 | 65 | 3.8 | 17.1 | 6.2 | 1.5 (1.2 to 1.9) | 1,185 | 67.6 | 17.5 | 6.6 | 1.4 (1.3 to 1.5) |
Results from fully adjusted Poisson regression analysis (stratified by gender and age tertiles).
Incidence rates and rate differences are given as MIs per 1000 person-years.
Py, person-years.