Table 1 Demographics in relation to first AMI and recurrent AMI.
| Type of AMI | Period | ||||
|---|---|---|---|---|---|
| 1985–1989 | 1990–1994 | 1995–1999 | 2000–2002 | p Value | |
| First AMI | n = 50 513 | n = 47 721 | n = 40 976 | n = 27 262 | |
| Mean age, year (SD) | 68.2 (11.7) | 68.8 (11.9) | 68.9 (12.6) | 69.6 (13.0) | <0.001 |
| Male sex, % | 65.3 | 64.0 | 63.3 | 62.3 | <0.001 |
| Length of hospital stay, days* | 10 (6–14) | 8 (5–10) | 7 (5–9) | 7 (5–10) | <0.001 |
| Recurrent AMI | n = 4219 | n = 4286 | n = 3010 | n = 2608 | |
| Incidence at 1 year (%) | 8.4 | 9.0 | 7.4 | 9.6 | 0.12 |
| Early recurrent AMI, n (%) | 1014 (2.0) | 1348 (2.8) | 1010 (2.5) | 1044 (3.8) | <0.001 |
| Late recurrent AMI, n (%) | 3205 (6.3) | 2938 (6.1) | 2000 (4.9) | 1564 (5.7) | <0.001 |
| Mean age, year (SD) | 66.9 (11.4) | 68.1 (11.6) | 69.4 (12.3) | 70.1 (12.3) | <0.001 |
| Male sex, % | 67.5 | 67.8 | 69.5 | 70.5 | 0.004 |
| Length of hospital stay, days* | 12 (5–16) | 9 (5–11) | 7 (6–10) | 7 (5–10) | <0.001 |
Recurrent AMI, recurrence within first year after initial AMI; early recurrent AMI, recurrence from 5 to 30 days after first AMI; late recurrent AMI, recurrence from 31 to 365 days after first AMI.
*Values are median (25% and 75% percentiles).