Rate ratios of mortality attributable to acute myocardial infarction by income, education, and occupational position (Swedish study population 1990–95, 10368 deaths, controlled for sex) as estimated by means of Cox regression
| Model 1 | Model 2 (mutually adjusted) | |||
|---|---|---|---|---|
| Rate ratios | 95% CI | Rate ratios | 95% CI | |
| Income (quintiles) | ||||
| Income: highest 20% (reference category) | 1 | – | 1 | – |
| Income: higher 20% | 1.42 | 1.32 to 1.54 | 1.21 | 1.11 to 1.31 |
| Income: mean 20% | 1.72 | 1.60 to 1.86 | 1.38 | 1.27 to 1.51 |
| Income: lower 20% | 2.03 | 1.87 to 2.21 | 1.63 | 1.49 to 1.79 |
| Income: lowest 20% | 2.44 | 2.26 to 2.63 | 1.89 | 1.74 to 2.06 |
| Not classified for income | 4.62 | 4.32 to 4.95 | 3.19 | 2.94 to 3.46 |
| Occupational position | ||||
| Intermediates/executives (reference category) | 1 | – | 1 | – |
| Non-manuals | 1.44 | 1.34 to 1.55 | 1.06 | 0.98 to 1.15 |
| Skilled manuals | 1.62 | 1.52 to 1.72 | 1.08 | 1.00 to 1.17 |
| Unskilled/semi skilled | 1.97 | 1.87 to 2.09 | 1.22 | 1.13 to 1.31 |
| Not classified for occupational position | 3.69 | 3.46 to 3.93 | 1.49 | 1.37 to 1.62 |
| Education | ||||
| University degree (reference category) | 1 | – | 1 | – |
| Long secondary | 1.34 | 1.22 to 1.47 | 1.16 | 1.06 to 1.28 |
| Short secondary | 1.71 | 1.57 to 1.86 | 1.28 | 1.16 to 1.41 |
| Basic | 2.24 | 2.09 to 2.40 | 1.45 | 1.33 to 1.57 |
| Not classified for education | 2.56 | 2.29 to 2.85 | 1.32 | 1.18 to 1.49 |