Table 3 Age-adjusted baseline characteristics of female patients aged 45 to 84 years that were hospitalized for first-time acute myocardial infarction in Swedish acute care facilities from 1993 to 1996 and who survived the first 28 days after admission (n = 16,041) according to cumulative income in the years 1975 and 1990.
| Â | Cumulative income* | Â | ||||||
|---|---|---|---|---|---|---|---|---|
| Â | 2 (n = 4,346) | 3 (n = 3,690) | 4 (n = 2,770) | 5 (n = 2,539) | 6 (n = 1,364) | 7 (n = 867) | 8 (n = 465) | p for trend |
Percentage of patients with previous hospitalizations (ICD codes): | Â | Â | Â | Â | Â | Â | Â | Â |
   Cancer (140–239) | 8.0 | 8.8 | 8.1 | 8.2 | 7.8 | 8.8 | 8.4 | 0.96 |
   Diseases of the respiratory system (460–519) | 10.0 | 9.5 | 9.1 | 8.5 | 7.8 | 8.7 | 6.1 | 0.001 |
   Diabetes (250) | 12.3 | 10.1 | 9.8 | 8.1 | 7.9 | 6.8 | 5.7 | < 0.001 |
   Hypertension (401–405) | 10.4 | 9.5 | 9.8 | 7.9 | 8.0 | 8.6 | 7.2 | 0.001 |
   Angina pectoris/other ischemic heart disease (413–414) | 15.3 | 15.2 | 14.9 | 14.8 | 12.2 | 13.8 | 9.0 | < 0.001 |
   Cerebrovascular disease (430–438) | 6.9 | 6.1 | 6.9 | 7.1 | 6.8 | 4.3 | 5.7 | 0.12 |
University hospital, (%) | 10.4 | 12.0 | 14.8 | 15.4 | 20.4 | 23.5 | 31.2 | < 0.001 |
Hospital volume | Â | Â | Â | Â | Â | Â | Â | Â |
   0 – 500 | 14.4 | 12.4 | 11.4 | 12.0 | 9.5 | 9.7 | 6.2 | < 0.001 |
   500 – 1500 | 34.1 | 31.5 | 31.4 | 29.5 | 28.3 | 27.3 | 29.5 | < 0.001 |
   1500 – 2500 | 47.0 | 47.5 | 47.6 | 48.2 | 47.9 | 48.5 | 51.7 | 0.064 |
   > 2500 | 5.3 | 7.4 | 8.7 | 9.2 | 12.8 | 15.4 | 13.1 | < 0.001 |
Revascularization†(%) | 1.2 | 2.1 | 2.3 | 2.7 | 2.7 | 3.1 | 2.1 | < 0.001 |