Can Ki-67 Play a Role in Prediction of Breast Cancer Patients' Response to Neoadjuvant Chemotherapy?

Table 1

Patient characteristics. Discrete data are given as numbers, continuous as the mean ± standard deviation.

Parameter	Value
Total number of patients	77
Age at first diagnosis (years)	57.8 ± 10.9
Tumor diameter (initial)	31.1 ± 13.6
Histotype
Invasive ductal	70 (90.9%)
Invasive lobular	6 (7.7%)
Others	1 (1.3%)
Tumor stage (initial)
1a	—
1b	1 (1.3%)
1c	6 (7.7%)
2	49 (63.6%)
3	5 (6.5%)
4	16 (20.7%)
Nodal status
Negative	25 (32.4 %)
Positive	52 (67.5%)
Metastasis
Negative	77 (100%)
Positive	—
Tumor grade
1	1 (1.3%)
2	37 (48%)
3	39 (50.6%)
Ki-67	34.9 ± 24.6
Estrogen receptor (ER)
Negative	35 (45.4%)
Positive	42 (54.5%)
Progesterone receptor (PR)
Negative	40 (51.9%)
Positive	37 (48%)
Her2 receptor
Negative	57 (74%)
Positive	20 (25.9%)
“Triple negative”	23 (29.8%)