Khemiri L, Brynte C, Konstenius M, et al. - Studies have described an association of impulsivity with several psychiatric disorders, including substance use disorders (SUD) and attention deficit hyperactivity disorder (ADHD). Researchers herein identified that the Swedish version of Barratt Impulsiveness Scale (swe-BIS) has good to excellent psychometric properties with respect to the assessed indices of reliability (internal consistency, test-retest and agreement) and validity (response processess, divergent and convergent). This supports its utility in clinical research in both healthy individuals and patients with SUD and ADHD.

• Translation of the original BIS to Swedish and its back-translation were performed by an authorized translator.

• Healthy controls (n = 113), patients with alcohol use disorder (n = 97), amphetamine use disorder (n = 37) and attention deficit hyperactivity disorder (ADHD; n = 26) were administered the swe-BIS.

• The swe-BIS was completed twice within 1 week by a subset of individuals (n = 62).

• Test and retest had a high level of agreement as per the Bland-Altman plot.

• Swe-BIS score was lower for healthy individuals vs patients, and also, significant difference was noted in terms of the swe-BIS total score between each of the four participant groups.

• There were greater correlations of swe-BIS with impulsivity related scales compared with non-impulsivity related scales.

• While far from optimal, the best model fit indices was found for a 3-factor model, that was based on the three BIS subscales of attentional, motor and non-planning impulsiveness.