Correlation between tumour grade and MMP-1 immunoreactivity. The histograms present an association between the histological grade of the breast cancer and the immunohistochemical expression of MMP-1. P-values for MMP-1 expression in tumour cells: overall p = 0.023, grade I vs. II p = 1.0, grade I vs. III p = 0.81, grade II vs. III p = 0.0177. P-values for MMP-1 expression in stromal cells: overall p = 0.0493, grade I vs. II p = 0.4839, grade I vs. III p = 0.1008, grade II vs. III p = 0.2637.
Boström et al. BMC Cancer 2011 11:348 doi:10.1186/1471-2407-11-348