Table 5: Cox multivariate analysis of probability of survival in tumours expressing KI-67 in Nigerian and UK breast cancer.

KI-67 positive expression
Variables P valueHazard ratio95% CI
Lower Upper

Racial difference
Nigeria versus UK
<0.0014.182.68 6.53
Lymph node0.691.090.71 1.67
Tumour size0.121.120.96 1.31
ER0.210.790.551.14