Table 3.
Association of Clinical Parameters With DFS by Multivariable Analysis
| Covariate | Level | DFS (Months) | ||
|---|---|---|---|---|
| Hazard Ratio | Hazard Ratio P | Type 3 P | ||
| Oncotype DX score | 1 to 10 | 3.07 (0.65–14.52) | .156 | .156 |
| 11 to < 18 | — | — | ||
| Chemotherapy | Yes | 6.85 (1.55–30.29) | .011* | .011* |
| No | — | — | ||
| Radiotherapy | Yes | 1.86 (0.37–9.38) | .451 | .451 |
| No | — | — | ||
| Age at diagnosis (years) | 0.95 (0.89–1.02) | .137 | .137 | |
Numbder of observations in original data set, 332; number of observations used, 314. Backward selection with alpha level of removal of .20 was used. The following variable was removed from the model: Nottingham tumor grade.
Abbredviation: DFS = disease-free survival.
*
Statistically significant.