The document examines the relationship between birth weight and developmental disabilities in children using data from the National Health Interview Survey. It finds that children with lower birth weights below 3,000g were more likely to have one or more developmental disabilities or special needs requiring educational services compared to children weighing 3,500-3,999g. Children below 2,500g also faced higher risks of multiple developmental disabilities. The study aims to evaluate how a child's full birth weight distribution correlates with prevalence of disabilities and health measures.