Fig. 6
From: The two decades brainclinics research archive for insights in neurophysiology (TDBRAIN) database

The iAPF (at Pz) related with age, and iAPF predicted from age. (a) the iAPF of all participants sorted by age (green) and the logGaussian function modeling the iAPF from age (blue). The model explains 4% of the variance and shows an initial steep increase of iAPF up till an age of approximately 18 years after which a slight decrease sets in. b) the distribution of the residuals that shows to be normal with a mean of 0.003 +/− 1.06 (Shapiro test for normality; stat = 0.99, p < 0.001).