Conjunction analysis examining overlap between disorders by thresholding p values to the top 20%, 15%, 10% and 5% significant vertices within each disorder for (A) cortical thickness, with p value thresholds as follows: p = 0.004 at 20%, p = 0.002 at 15%, and p < 0.001 at both the 10% and 5% thresholds for patients with autism-spectrum disorders (ASD); p = 0.07 at 20%, p = 0.06 at 15%, p = 0.040 at 10% and p = 0.023 at the 5% threshold for patients with attention-deficit/hyperactivity disorder (ADHD); and p < 0.001 at all thresholds for patients with schizophrenia (SCZ), and (B) surface area, with p value thresholds as follows: ASD p = 0.20 at 20%, p = 0.14 at 15%, p = 0.09 at 10% and p = 0.032 at the 5% threshold for patients with ASD; p = 0.12 at 20%, p = 0.09 at 15%, p = 0.05 at 10% and p = 0.028 at the 5% threshold for patients with ADHD; and p < 0.001 at all thresholds for patients with schizophrenia.