Fig. 5:

Linear regression of serum cortisol concentration with age in male and female baboons. Plot of serum cortisol concentration versus donor age in combined data of male and female baboons, with regression line represented by a thick line, and each individual dot representing data from an individual animal, n=60 (A). Plot of serum cortisol concentration with age, showing separate analysis for males and females. Filled dots and the thick line depict individual male data and their regression line, respectively, n=24, while open dots and the dashed line represent female data and their regression line, respectively, n=36 (B).