Related Experiment Videos
Insights
Boys are more frequently affected by mental retardation, particularly genetic forms. X-linked mental retardation is a significant factor, especially in boys with genetic intellectual disability.
Area of Science:
- Pediatrics
- Genetics
- Neurodevelopmental Disorders
Context:
- Investigated the prevalence and characteristics of mental retardation in children.
- Examined a cohort of 600 children aged 5-9 years with mental retardation.
- Analyzed the boy-to-girl ratio (B:G) across different etiological categories.
Purpose:
- To determine the prevalence of mental retardation in children.
- To explore the sex-based differences in mental retardation.
- To assess the frequency of X-linked mental retardation in relation to genetic and exogenous causes.
Summary:
- A higher prevalence of boys was observed in the total group (B:G = 1.3) and in those with genetic origins (B:G = 1.4).
- Monogenic forms of mental retardation showed a significant male predominance.
- The frequency of X-linked mental retardation was 12.5% overall, higher in boys (22.1%) and particularly in boys with genetic forms (28.5%).
Impact:
- Highlights the significant role of genetic factors and X-linked inheritance in male mental retardation.
- Provides data for understanding sex differences in intellectual disability.
- Informs genetic counseling and targeted research for male intellectual disability.
Abstract:
600 mentally retarded children, 339 boys and 261 girls aged 5-9 years were examined. Boys to girls ratio (B:G) was found in the total group to be 1.3. Among 257 children with mental retardation of confirmed genetic origin B:G = 1.4, in 129 children with confirmed exogenous defects B:G = 1.04. The significant prevalence of boys over girls was characteristic of children with monogenic forms. The frequency of X-linked mental retardation in the total group, in all mentally retarded boys and in boys with genetic forms was 12.5 +/- 1.3%, 22.1 +/- 2.2% and 28.5 +/- 2.8%, respectively. The frequency of X-linked mental retardation was higher in boys with genetic forms of imbecility.