Assessment of Sonographic Carotid Parameters in Autism Spectrum Disorder: A Comparative Case Control Study.

Objective: To compare carotid intima-media thickness (cIMT), systolic and diastolic diameters (D), intima-media thickness/diameter ratio (IDR) values in children with ASD, and control groups, and to analyze the correlation of these parameters with the Childhood Autism Rating Scale (CARS) scores.

Methods: This prospective case-control study included 37 children diagnosed with ASD and 38 individuals without ASD in the control group. Correlation assessments of sonographic measurements with CARS scores in the ASD group were also performed.

Results: Diastolic diameters of the right (median of ASD group:5.5 mm, control group:5.1 mm) and left (median of ASD group: 5.5 mm, in control group: 5.1 mm) side were higher in the ASD group (p = .015 and p = .032 respectively). A statistically significant correlation was detected between CARS score and left cIMT, right cIMT, right cIMT/systolic D, right cIMT/diastolic D, left cIMT/systolic D, and left cIMT/diastolic D (p < .05).

Conclusion: Vascular diameters, cIMT, and IDR values of children with ASD positively correlated with CARS scores, and these findings could be interpreted as a marker of early atherosclerosis in children with ASD.