borderline significantP = 0.04
It can be seen that hair color in analyses adjusted for factors known to have an effect on outcome (age, sex and tumor thickness) was borderline significant as a determinant of OS (HR, 0.58; 95% CI, 0.35–0.97; P = 0.04, considering red hair compared with black/brown, adjusted for age, sex, Breslow thickness, and site of the primary).