Table 4. Multivariate analysis of independent variables associated with RS.
| Characteristics | Intermediate vs low risk | High vs low risk | ||||
|---|---|---|---|---|---|---|
| OR | 95%CI | P value | OR | 95%CI | P value | |
| All patients(N=980) | ||||||
| Grade | ||||||
| I | 1 | 1 | ||||
| II | 1.576 | 1.006~2.470 | 0.047 | 2.709 | 1.309~5.606 | 0.007 |
| III | 2.607 | 1.363~4.988 | 0.004 | 10.035 | 4.222~23.854 | <0.001 |
| T stage | NS | NS | ||||
| PR | <0.001 | <0.001 | ||||
| Positive | 1 | 1 | ||||
| Negative | 4.397 | 1.952~9.901 | 12.039 | 5.207~27.836 | ||
| Ki67 | NS | 0.031 | ||||
| <14 | 1 | |||||
| ≥14 | 1.719 | 1.051~2.812 | ||||
| Node-negative patients(N=874) | ||||||
| Grade | ||||||
| I | 1 | 1 | ||||
| II | 1.662 | 1.041~2.655 | 0.033 | 2.724 | 1.303~5.694 | 0.008 |
| III | 2.463 | 1.241~4.889 | 0.010 | 9.730 | 3.994~23.701 | <0.001 |
| PR | <0.001 | <0.001 | ||||
| Positive | 1 | 1 | ||||
| Negative | 4.451 | 1.969~10.063 | 10.760 | 4.604~25.149 | ||
| Ki67 | NS | NS | ||||
| Node-positive patients(N=106) | ||||||
| Grade | NS | NS | ||||
| PR | NS | NS | ||||
| Ki67 | NS | NS | ||||
Abbreviations: PR, progesterone receptor; OR, odds ratio; CI, confidence interval; NS, not significant.