Methods: This was a study designed to retrospectively determine any association between hyperbaric oxygen therapy (HBOT) and change in verbal scores in children with autism spectrum disorder (ASD). All children aged 2 to 17 years, diagnosed with ASD who completed a verbal test every six months (either Verbal Behavior Milestones Assessment and Placement Program or the Assessment of Basic Language and Learning Skills), received applied behavioral analysis at Oxford Recovery Center (ORC) were screened for inclusion, some of whom had elected to receive HBOT (at least 40 sessions for 60 minutes at 2.0 ATA).
