Medical Histories of Adults with Autism vs. Neurotypical Adults, and Correlation of GI Symptom Severity

Background: Currently, we do not know the direct cause of autism spectrum disorder (ASD). A correlation between the gut microbiome and ASD may play a key role in normalizing ASD symptoms that plague many around the world. Furthermore, microbiota transfer therapy (MTT) may be the next step toward reducing GI symptoms in people impacted with ASD. The Medical Histories of ASD and NT (Neurotypical) adults may help find further information that could help find causes that contribute to the development of ASD. Objective: To identify key questions in the Medical History Questionnaire and evaluate differences between the ASD and NT participants. Results: There are 53 ASD participants and 43 NT participants with mean ages of 23.3 and 25.6 respectively. The mean birth weights of each group remain relatively similar (122.3 vs. 117). A greater number of NT participants were delivered vaginally than ASD participants (72.5% vs. 66%). More ASD participants were born before 40 weeks than NT participants (26.4% vs. 7.5%). NT participants, on average, were breastfed almost two times longer than ASD participants (11.2 months vs. 6.4). ASD participants required more time to be toilet trained for both urine and stool output (3.3 years vs. 2.4 years for urine and 4.3 years vs. 2.7 years for stool output). ASD participants have more food allergies with a higher severity and an equal likelihood of seasonal allergies but with a higher severity. ASD participants mainly reported a major regression at an average age of 19.6 months or an abnormal development from early infancy. Maternal and Paternal Histories are more severe in GI problems, ASD, Delayed Speech, Learning Disabilities, Asthma, Eczema, Seasonal and Food Allergies for ASD participants than NT participants. The most significant finding was the ASD participants’ average age of GI symptoms starting was 3.1 compared to 17.9 for NT participants. Conclusions and Relevance: There are many factors that may contribute to the development of ASD in early childhood. Further research in a larger sample size may demonstrate more significant differences in ASD and NT populations.