Table 5.

Multivariate analysis of prognostic factors for OS

Prognostic factorRelative risk (95% confidence interval)P
Age (continuous)0.958 (0.910-1.008)0.097
Axillary lymph nodes
    Negative2.488 (1.691-3.660)0.0001*
    Positive (1-3 nodes)
    Positive (4-10 nodes)
    Positive (>10 nodes)
Anemia
    Hb ≥12 g/dL0.910 (0.388-2.137)0.829
    Hb <12 g/dL
Tumor stage
    T11.377 (0.781-2.427)0.269
    T2
    T3
Type of surgery
    Breast-conserving surgery1.395 (0.483-4.029)0.539
    Modified radical mastectomy
Radiotherapy
    No1.056 (0.389-2.868)0.915
    Yes
Estrogen receptor status
    Negative0.733 (0.377-1.427)0.361
    Positive
    Strongly positive
Progesterone receptor status
    Negative1.245 (0.743-2.089)0.406
    Positive
    Strongly positive
Histologic grading
    G1, G2, or unknown1.578 (0.798-3.119)40.190
    G3
  • * Statistically significant.