BDNF and Anxiety: In both control (non-pilo) and epilepsy (pilo) conditions, we found a strong linear relationship between anxiety levels and serum BDNF levels, the housing condition just shifting the distribution of points, r = –0.923 95% CI[–0.948, –0.7439], p < 0.0001 and r = –0.882 95% CI[–0.967, –0.625], p < 0.0001 for non-pilo and pilo groups, respectively (Fig. 6D).