Assessing Internal Consistency of the Autism Spectrum Disorder Gastrointestinal and Related Behaviors Inventory and the Frequency and Socio-Emotional Correlates of Gastrointestinal Difficulties in Children With the Autism Spectrum Disorder: A Cross-Sectional Study.

Gastrointestinal (GI) difficulties are common in children diagnosed with autism spectrum disorder (ASD). However, these difficulties can frequently remain unrecognized. Therefore, we aimed to translate a newly developed instrument, The Autism Spectrum Disorder Gastrointestinal and Related Behaviors Inventory in Children (ASD-GIRBI), to assess its reliability and to explore the frequency of various gastrointestinal difficulties and related behaviors, as well as to explore the association of GI difficulties with the measures of social functioning and emotional and behavioral difficulties in children with ASD. A total of 98 children and adolescents (aged 4-18 [M age = 10.67 ± 3.705], 82.7% male), previously diagnosed with ASD at the Institute of Mental Health in Belgrade, Serbia, took part in this research. Their parents filled out the following questionnaires: ASD-GIRBI (an assessment of gastrointestinal and related symptoms), Stanford Social Dimensions Scale (SSDS) (a measure of social functioning) and Strengths and Difficulties Questionnaire (SDQ) (a measure of emotional and behavioral problems). Our results indicate that the ASD-GIRBI is a reliable instrument for GI difficulties assessment (Cronbach's α = 0.841) with the total score successfully discriminating between the participants with and without a GI disorder diagnosis (p = 0.040). Any gastrointestinal symptom was present in 54.1% of the participants, most commonly flatulence, diarrhea, and constipation. The severity of gastrointestinal difficulties correlated to emotional problems (r = 0.261, p < 0.01), conduct problems (r = 0.219, p < 0.05), hyperactivity (r = 0.381, p < 0.01), peer problems (r = 0.266, p < 0.01), total difficulties (r = 0.454, p < 0.01) and total difficulties impact (r = 0.321, p < 0.01). Our data emphasize the potential importance of GI difficulties for various areas of functioning of individuals with ASD.