Figure 2.

Longitudinal age-based comparison of total serum cholesterol in human and captive chimpanzee populations. Chimpanzee and human cholesterol levels were taken from two independent, original articles and plotted here, on the same axis, for comparison. Total serum cholesterol data from both publications was grouped by sex and age in decades. Human data were acquired from 6757 participants in the Framingham Heart Study, aged 15–79 years (Abbott et al. 1983). Chimpanzee data were acquired from 252 chimpanzees, aged 0–60, living in captivity at the Yerkes Primate Center (Herndon and Tigges 2001). Data are plotted as mean ± 95% CI. Error bars are not shown for the oldest chimps (5th decade in males, n = 1; 6th decade in females, n = 3) due to the very small sample size. Note that the total serum cholesterol (Y axis) starts at 100 mg/dL, to make the differences clearer.