|
| Variable | Levels | Application in analysis |
|
| Ds: disease | 1 if incident disease (first time event of CHD, stroke, or lung cancer in 1999 or COPD hospitalisation in 2006) | Main explanatory variable |
| Age | 1-year age group | Included in propensity score |
| 5-year age intervals | 5-year age group | Used for stratification of matching procedure |
| Gender | 0 if man; 1 if woman | Used for stratification of matching procedure |
| CMI: comorbidities | Diseases weigh from 1 to 6 (modified Charlson index) | Included in propensity score |
| Married: marital status | 1 if married or cohabiting, 0 otherwise | Included in propensity score |
| Origin: national origin | 0 if Danish; 1 if not Danish | Included in propensity score |
| Edu: length of education | 1–8, where 8 is university degree | Included in propensity score |
| Socio: socioeconomic status at baseline (1998) People outside the labour market were excluded from this analysis | (1) Self-employed | Included in propensity score |
| (2) White collar |
| (3) Blue collar |
| (4) Unemployed |
| Residence | Regional code used as a proxy for urban/rural | Included in propensity score |
| LM: labour market affiliation | 1 if employed or unemployed, 0 if retired or dead | Outcome variable |
| Wage | Continuous variable expressing the difference between wage in 2000 and wage in 1998 | Outcome variable |
|
