Multivariate Cox regression: relative mortality risks for income, qualification, and gender
| Relative risk | 95% confidence intervals | |
| Higher 20%6-150 | 1.30 | 1.11, 1.53 |
| Mean 20%6-150 | 1.81 | 1.53, 2.13 |
| Lower 20%6-150 | 2.58 | 2.17, 3.07 |
| Lowest 20%6-150 | 2.03 | 1.68, 2.46 |
| Qualification (1)† | 1.28 | 0.43, 3.81 |
| Qualification (2)† | 1.29 | 0.54, 3.12 |
| Qualification (3)† | 1.24 | 0.51, 2.98 |
| Gender (females)‡ | 0.27 | 0.23, 0.31 |
↵6-150 The highest 20% of the income distribution serves as reference category. †The highest qualification group (academic training) serves as reference category. Qualification (1): “13 years of school with or without vocational training”; qualification (2): “nine or 10 years of school and vocational training”; qualification (3): “nine or 10 years or less without vocational training”. ‡Men serve as reference category.