Factor structure and concurrent construct validity of ICG among bereaved substance users.

Background: It is important to understand the repercussions of Complicated Grief (CG) symptoms in addictions. There are no studies to date which have examined the psychometric properties of any test of bereavement among people with substance use disorder (SUD). Participants with SUD can have a different experience of bereavement from other people and therefore could respond differently to the usual instruments which assess CG symptomatology.