Importance Neuraxial labor analgesia is recognized as the most effective method of providing pain relief during labor. Little is known about variation in the rates of neuraxial analgesia across US states. Identifying the presence and extent of variation may provide insights into practice variation and may indicate where access to neuraxial analgesia is inadequate. Objective To test the hypothesis that variation exists in neuraxial labor analgesia use among US states. Design, Setting, and Participants Retrospective, population
