Neighborhood resources are associated with neuropsychological outcomes among pediatric brain tumor survivors

<b>Background:</b> Cancer-related cognitive impairment in survivors of pediatric brain tumors is a public health concern, yet studies seldom explore the role of social determinants of health beyond treatment effects. We investigated the influence of neighborhood resources using the Child Opportunity Index (COI) on neuropsychological functioning in survivors. <b>Methods:</b> Intelligence (IQ) and untimed reading and math proficiency were assessed retrospectively in 190 survivors. Multiple regression analyses explored associations among the COI composite and indices (Education, Health-Environment, Social-Economic) and neuropsychological outcomes, controlling for cumulative neurological risk and treatment exposures (Neurological Predictor Scale; NPS) and parental education. <b>Results:</b> Performance was on average within normal limits: IQ (<i>M</i> = 94.08, SD = 15.85, <i>d</i>=.37) with 13.4% of scores below impairment thresholds; reading (<i>M</i> = 95.08, SD = 17.36, <i>d</i>=.28) and math calculation (<i>M</i> = 91.84, SD = 18.82, <i>d</i>=.43) with 16.92% and 20.63% of scores below impairment thresholds, respectively. Each COI domain predicted reading and IQ after controlling for NPS, parental education, and age at diagnosis; however, the Education domain was the only significant predictor of math outcomes. <b>Conclusion:</b> The COI domains significantly predicted IQ and untimed academic skills in survivors, revealing the critical role of neighborhood resources on cognition above and beyond parental education and treatment factors. This is among the first studies to illuminate the influence of neighborhood resources on cognition in survivors. Future research should examine neighborhood context, an understudied construct, with importance in the move toward precision medicine.