Table 2.
Adjusted Odds Ratios of Chemotherapy Use
| Models | ||||
|---|---|---|---|---|
| [1] | [2] | [3] | [3b] | |
| Stages | ||||
| 1 | — | 1.00 | 1.00 | 1.00 |
| 2 | — | 6.68*** | 6.87*** | 6.75*** |
| 3 | — | 10.71*** | 10.86*** | 10.83*** |
| 4 | — | 7.08*** | 7.26*** | 7.22*** |
| Unknown | 2.79*** | 2.89*** | 2.87*** | |
| Age (years) | ||||
| 65–69 | — | 1.00 | 1.00 | 1.00 |
| 70–74 | — | 0.86** | 0.85** | 0.85** |
| 75–79 | — | 0.53*** | 0.54*** | 0.53*** |
| 80–84 | — | 0.27*** | 0.27*** | 0.27*** |
| 85+ | — | 0.10*** | 0.10*** | 0.10*** |
| Time trend | — | 1.04*** | 1.02*** | 1.04*** |
| Race | ||||
| White | — | — | 1.00 | 1.00 |
| Black | — | — | 0.66** | 0.48*** |
| Other | — | — | 1.38 | 1.27 |
| Education | ||||
| Less than high school degree | — | — | 1.00 | — |
| High school degree | — | — | 0.44 | — |
| Some college | — | — | 1.00 | — |
| College | — | — | 0.97 | — |
| Household income | — | — | 1.08*** | — |
| χ2 for group of variables | ||||
| Comorbidity controls (df=46) | — | 226*** | 216*** | 220*** |
| HRR controls (df=38) | 146*** | 168*** | 149*** | 160*** |
| Fit of model | ||||
| C-statistic | 0.58 | 0.80 | 0.81 | 0.80 |
*
.05<p-value<.10
**
.001<p-value<.05
***
p-value<.001.
HRR, health referral region.