SCL-90 symptom scales (a) and global severity index (b) in the low (n=44) and the high (n=44) P50 subgroups. SO, somatization; OC, obsessive–compulsive; IS, interpersonal sensitivity; DE, depression; AN, anxiety; HO, hostility; PA, phobic anxiety; PI, paranoid ideation; PS, psychoticism. *Significant difference between low- and high-gating subgroups. Error bars refer to SEM.