Table 2 Association between absolute and relative income and risk of chronic obstructive pulmonary disease in the 333 952 men and 333 142 women aged 55 to 60Â years and residing in Sweden in 2011. Values are OR, 95% CI, and AUC
| Â | Model 1 (Age) | Model 2 (Age and absolute income) | Model 3 (Age and relative income) | Model 4 (Age and absolute and relative income) |
|---|---|---|---|---|
| Â | OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) |
MEN | ||||
 Age (1 year) | 1.09 (1.05–1.14) | 1.05 (1.06–1.15) | 1.09 (1.05–1.14) | 1.11 (1.06–1.15) |
Absolute incomea | ||||
 High |  | REF |  | REF |
 Medium high |  | 1.43 (1.15–1.78) |  | 1.44 (1.16–1.80) |
 Medium |  | 2.10 (1.67–2.64) |  | 2.11 (1.68–2.65) |
 Medium low |  | 3.44 (2.77–4.27) |  | 3.44 (2.77–4.27) |
 Low |  | 3.40 (2.73–4.23) |  | 3.39 (2.73–4.22) |
Relative incomeb | ||||
 High |  |  | REF | REF |
 Medium high |  |  | 1.35 (1.08–1.68) | 1.34 (1.08–1.68) |
 Medium |  |  | 1.37 (1.09–1.71) | 1.36 (1.08–1.69) |
 Medium low |  |  | 1.32 (1.05–1.66) | 1.31 (1.04–1.64) |
 Low |  |  | 1.34 (1.06–1.69) | 1.31 (1.04–1.64) |
AUC (95% CI) | 0.54 (0.52–0.56) | 0.65 (0.63–0.66) | 0.55 (0.53–0.57) | 0.65 (0.63–0.67) |
WOMEN | ||||
 Age (1 year) | 1.05 (1.01–1.09) | 1.06 (1.02–1.10) | 1.05 (1.01–1.09) | 1.06 (1.02–1.10) |
Absolute income | ||||
 High |  | REF |  | REF |
 Medium high |  | 1.83 (1.51–2.22) |  | 1.84 (1.52–2.24) |
 Medium |  | 2.36 (1.92–2.91) |  | 2.39 (1.94–2.95) |
 Medium low |  | 3.71 (3.03–4.55) |  | 3.73 (3.05–4.58) |
 Low |  | 3.17 (2.54–3.97) |  | 3.20 (2.56–4.01) |
Relative income | ||||
 High |  |  | REF | REF |
 Medium high |  |  | 1.23 (1.01–1.50) | 1.25 (1.03–1.52) |
 Medium |  |  | 1.08 (0.88–1.33) | 1.11 (0.91–1.36) |
 Medium low |  |  | 1.27 (1.04–1.56) | 1.34 (1.10–1.64) |
 Low |  |  | 1.09 (0.88–1.35) | 1.15 (0.93–1.42) |
AUC (95% CI) | 0.53 (0.51–0.54) | 0.63 (0.62–0.65) | 0.54 (0.52–0.55) | 0.64 (0.62–0.65) |