Participants were evaluated at the beginning and at the end of the follow-up period using the rating scales that showed a significant difference between the groups after the 12-week trial with fatty acids supplementation: the Borderline Personality Disorder Severity Index (BPDSI) (items 'impulsivity' and 'outbursts of anger'), Barratt Impulsiveness Scale-Version 11 (BIS-11), and Self Harm Inventory (SHI).
A group×genotype×abuse interaction was present (F(2,49)=4.4, <i>p</i>=0.018), such that the interaction of MAOA-L and childhood abuse predicted greater BIS-11 motor impulsiveness in BPD.