Figure 2.

Correlation between human epidermal growth factor receptor 2 immunohistochemistry digital imaging analysis connectivity and human epidermal growth factor receptor 2 fluorescence in situ hybridization copy number. The Pearson correlation coefficient (r) for human epidermal growth factor receptor 2 immunohistochemistry digital imaging analysis connectivity and human epidermal growth factor receptor 2 fluorescence in situ hybridization copy number was 0.860594 (n = 442; P < 0.0001). (y = 20.498x + 1.7076. R^² =0.7245)