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BDNF, intellectual enrichment and cognitive function. Association between the BDNF predictor and intellectual enrichment with global cognitive function [t(203.5) = 2.760, P = 0.006]. Regression lines show the predicted effect of carrying (red) and not carrying (black) the Met66 allele. The bands around the regression lines are 95% confidence intervals. Data points show the raw data residualized against age, site, sex and use of antipsychotic medication.
