KLK3 and posterior cortical atrophy: The risk of receiving a PCa diagnosis based on biopsy results was consistently higher among African American men with prebiopsy PSA levels lower than 10 ng/mL (hazard ratio, 1.32; 95% CI, 1.30-1.34; P < .001) and 10 to 20 ng/mL (hazard ratio, 1.14; 95% CI, 1.07-1.21; P < .001) (Figure 3A).