Factors Affecting Quality of Life in Adolescent Siblings of Children With Autism Spectrum Disorder

To compare the quality of life (QoL) of adolescent siblings of children with autism spectrum disorder (ASD-Sibs) with siblings of typically developing children (TD-Sibs), and study the factors affecting the QoL.

Between 1 February, 2021 and 31 September, 2021, 40 children aged 10-18 years, whose sibling was suffering from ASD, were enrolled (Study group). 40 age- and sex-matched siblings of children with no clinically apparent neuro- developmental abnormality or behavioral problem were also enrolled (Control group). Severity of autism was assessed by using the childhood autism rating scale 2 (CARS-2) score. QoL was assessed by a validated version of the World Health Organi-zation Quality of Life questionnaire Brief version (WHO QoL BREF), and compared between cases and controls using Wilcoxon rank sum test.

The mean (SD) age of study participants was 13.55 (2.75) years. The mean (SD) CARS-2 score of our sample was 35.78 (5.23). Mild to moderate autism was seen in 23 (57.5%) children, and 13 (32.5%) had severe autism. The median (IQR) QoL in ASD-Sibs was worse than TD-Sibs in physical domain (24 (19,26) vs 32 (29,32); P<0.001), psychological domain (22 (17,23) vs 25 (23,25); P<0.001), social domain (11 (8,12) vs 13 (11,14); P<0.001), and environmental domain (28 (26,31) vs 35 (31,35); P<0.001). Among the ASD-Sibs, severity of the sibling's ASD and the family's socioeconomic status were the only two factors significantly affecting one of the domains of QoL.

The observed lower QoL score in adolescent siblings of children with ASD, more so in those whose siblings had more severe ASD, suggests the need for targeting the family as a unit while formulating plans for holistic management of children with ASD.