MKI67 and blue cone monochromacy: Furthermore, a Cox-regression analysis showed, that the BCM was significantly higher in the high Ki67-group compared to the low Ki67-group (hazard ratio (HR) = 2.6, 95% confidence interval (95% CI): 1.2-5.8, p = 0.01), whereas the difference between the intermediate Ki67-group and the low Ki67-group was non-significant (HR = 1.4, 95% CI: 0.84-2.5, p = 0.19) (Figure 3).