Table 2 Univariate and multivariable Cox proportional hazard models of prostate cancer incidence
Variables | Univariate Models | Model 1 | Model 2 | Model 3 | Model 4 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
HR | (95% CI) | p-value | HR | (95% CI) | p-value | HR | (95% CI) | p-value | HR | (95% CI) | p-value | HR | (95% CI) | p-value | |
Group | |||||||||||||||
 Insured | 1.00 | (reference) |  | 1.00 | (reference) |  | 1.00 | (reference) |  | 1.00 | (reference) |  | 1.00 | (reference) |  |
 Dependents | 1.89 | (1.80–1.98) | < 0.001 | 1.04 | (0.99–1.09) | 0.149 | 0.96 | (0.90–1.01) | 0.118 | 1.01 | (0.96–1.07) | 0.711 | 0.98 | (0.93–1.04) | 0.515 |
Age, yrs | |||||||||||||||
 50–59 | 1.00 | (reference) |  | 1.00 | (reference) |  | 1.00 | (reference) |  | 1.00 | (reference) |  | 1.00 | (reference) |  |
 60–69 | 5.38 | (5.01–5.77) | < 0.001 | 5.32 | (4.95–5.72) | < 0.001 | 5.51 | (5.12–5.92) | < 0.001 | 5.47 | (5.08–5.89) | < 0.001 | 5.48 | (5.09–5.90) | < 0.001 |
 70–79 | 12.02 | (11.22–12.89) | < 0.001 | 11.89 | (11.08–12.77) | < 0.001 | 12.61 | (11.71–13.58) | < 0.001 | 12.43 | (11.52–13.41) | < 0.001 | 12.44 | (11.53–13.42) | < 0.001 |
Occupation | |||||||||||||||
 Labor | 1.00 | (reference) |  | – | – | – | 1.00 | (reference) |  | – | – | – | 1.00 | (reference) |  |
 Enterprise employee | 0.81 | (0.76–0.86) | < 0.001 | – | – | – | 1.17 | (1.10–1.24) | < 0.001 | – | – | – | 1.14 | (1.05–1.23) | 0.002 |
 Government employee | 1.13 | (1.03–1.23) | 0.008 | – | – | – | 1.33 | (1.21–1.46) | < 0.001 | – | – | – | 1.23 | (1.10–1.39) | < 0.001 |
Income, TWD | |||||||||||||||
 17,881–21,900 | 1.00 | (reference) |  | – | – | – | – | – | – | 1.00 | (reference) |  | 1.00 | (reference) |  |
 21,901–40,100 | 0.55 | (0.51–0.58) | < 0.001 | – | – | – | – | – | – | 0.96 | (0.90–1.03) | 0.212 | 0.89 | (0.82–0.96) | 0.003 |
  > 40,100 | 0.72 | (0.68–0.76) | < 0.001 | – | – | – | – | – | – | 1.25 | (1.18–1.33) | < 0.001 | 1.11 | (1.02–1.21) | 0.019 |