Maternal Accommodation of Adolescent Body Dysmorphic Disorder: Clinical Correlates and Association with Treatment Outcomes.

Family accommodation (FA) is widely-recognised as an important clinical phenomenon in obsessive-compulsive disorder (OCD) and anxiety disorders, and is related to poorer treatment outcomes. However, FA has not been quantitatively explored in Body Dysmorphic Disorder (BDD). The aim of this study was to investigate the patterns and correlates of maternal accommodation in adolescent BDD, and its association with treatment outcomes. Participants were 131 adolescents with BDD and their mothers who completed the Family Accommodation Scale-Parent Report (FAS-PR) as part of routine clinical practice in a National and Specialist Service for Young People at the Maudsley Hospital, London. Seventy-six (58%) young people received specialist cognitive behavioural therapy for BDD and had post-treatment data available. All mothers engaged in at least one form of accommodation. Providing reassurance (98.5%) and assisting avoidance (88.5%) were the most commonly endorsed behaviours. Levels of accommodation were positively associated with clinician-rated BDD symptom severity (r = 0.18, p = 0.041) and maternal symptoms of anxiety, depression and stress (r = 0.41, p < 0.001), and negatively associated with child global functioning (r = -0.38, p < 0.001). Maternal accommodation did not predict treatment outcomes (β = 0.055, p > 0.05). The findings indicate that maternal accommodation is common and has important clinical correlates, but does not impact on treatment response. Consequently, the relationship between maternal accommodation and BDD symptoms may differ to that evidenced in paediatric OCD. Future longitudinal research exploring maternal and paternal accommodation, and assessing variables of interest at multiple time-points throughout treatment, is needed to advance understanding of the role of FA in adolescent BDD.