There is a paucity of data on missed imaging appointments a.k.a., imaging missed care opportunities (IMCO) in pediatric nuclear medicine (NM), and related sociodemographic factors, specifically, Child Opportunity Index (COI), a composite measure of U.S. neighborhood resources linked to healthy child development. COI levels group neighborhoods into quintiles: very low-, low-, moderate-, high- & very high- opportunity. The primary aim was to examine association of COI with IMCO for ambulatory …