Table 2. Association of Treatment With Progression- or Relapse-Free Survival by Level of Demographic and Insurance Variablesa.
| Factor | Hazard ratio (95% CI) | P value | |
|---|---|---|---|
| Null | Interaction | ||
| Age, y | |||
| ≥65 | 1.33 (1.23-1.44) | <.001 | .18 |
| <65 | 1.43 (1.33-1.53) | <.001 | |
| Overall | 1.38 (1.31-1.46) | <.001 | |
| Sex | |||
| Female | 1.43 (1.26-1.62) | <.001 | .53 |
| Male | 1.51 (1.37-1.66) | <.001 | |
| Overall | 1.48 (1.37-1.60) | <.001 | |
| Race/ethnicity | |||
| Minority | 1.33 (1.16-1.53) | <.001 | .15 |
| Not minority | 1.49 (1.39-1.60) | <.001 | |
| Overall | 1.43 (1.33-1.53) | <.001 | |
| Insurance status | |||
| Medicaid or no insurance | 1.32 (1.06-1.64) | .01 | .03 |
| Private insurance | 1.74 (1.54-1.97) | <.001 | |
| Overall | 1.63 (1.46-1.81) | <.001 | |
a
Results by sociodemographic variable–level are derived from a single-adjusted model controlling for the covariates specified in the Methods section.