Variables No. of missing records Type of data Mean Std. Dev. Range
Age at diagnosis 2 Numeric 46.44 11.09 18-87
Age at Menarche 38 Numeric 13.50 1.49 8-20
Age at Menopause 570 Numeric 47.14 5.56 32
Tumor Size 159 Numeric 2.97 1.57 0-15
LN involvement 58 Numeric 0.93 1.01 0- ≥9
Grade 284 Numeric 2.15 0.64 2
Nexion (Lymph node dissection) 360 Numeric 10.89 5.13 0-35
Her2 504 Numeric 0.39 0.48 + or -
Table 2: Predictor Variables.