Figure 1. Effect of age on uNEO levels in 43 adult Barbary macaques.

Regression line was fitted according to the estimates of Model 2 (n = 179 samples), broken lines depict 95% confidence intervals. Log-transformed uNEO-values have been plotted against the original age values to allow easier interpretation instead of age scaled to mean age used in the model (which changes the y-intercept, but neither estimates nor interpretation of the model).