Adverse impact of neighbourhood socioeconomic deprivation on psychological treatment outcomes: the role of area-level income and crime.

Aim: Socioeconomic deprivation is known to be associated with depression and anxiety symptoms. This study aimed to investigate the influence of several domains of neighbourhood deprivation on psychological treatment outcomes. Method: Healthcare records from 44805 patients who accessed psychological treatment were analyzed. Patient-level depression (PHQ-9) and anxiety (GAD-7) outcome measures were linked to their neighbourhood statistics, including area-level indices of income, unemployment, education, health and disability, crime, housing quality, and quality of the local environment. Linear regressions were applied to examine associations between these domains and post-treatment symptom severity after controlling for patient-level and service-level variables. Results: Neighbourhood income and crime rates were associated with depression and anxiety symptoms after controlling for covariates, explaining 4% to 5% of variability in treatment outcomes. Patients living in low-income areas required a higher number of treatment sessions to benefit from therapy. Conclusions: Patients living in economically deprived neighbourhoods tend to have poorer depression and anxiety treatment outcomes and require lengthier interventions.