Social and emotional characteristics of girls and young women with <i>DDX3X</i> -linked intellectual disability: A descriptive and comparative study
Bibliographic record
Abstract
Abstract Background DDX3X variants are a common cause of intellectual disability (ID) in females. Previous studies have reported high rates of autism spectrum disorder and emotional-behavioural difficulties within this group. However, no study has compared social and emotional characteristics in individuals with DDX3X variants to individuals with other monogenic causes of ID. Methods Twenty-three females with pathogenic or likely pathogenic DDX3X variants were recruited via UK regional genetics centres, genetic research cohorts, and family support groups. Twenty-three females with ID and variants in other genes were recruited via the same routes. Phenotypic data were collected through semi-structured interviews and standardised questionnaires. Results In line with previous research, we found a wide range of adaptive, social and emotional function within the DDX3X group. Autism characteristics assessed via the Social Responsiveness Scale (SRS) did not differ between DDX3X and comparison groups, while levels of anxiety and self-injurious behaviour (SIB) scores assessed via the Developmental Behaviour Checklist (DBC) were significantly higher in the DDX3X group. Autistic characteristics, anxiety and SIB scores were positively correlated within the DDX3X group. Individuals with DDX3X missense variants had poorer adaptive abilities than those with protein truncating variants as previously reported, but DDX3X variant type did not significantly predict emotional and behavioural characteristics. Conclusions We provide quantitative evidence that overall incidence of autistic characteristics is not higher amongst girls and women with DDX3X variants than expected for ID. However, the DDX3X group demonstrates more SIBs and anxiety symptoms than expected, with close relationships between SIBs and anxiety, and between anxiety and autistic characteristics. Future work is warranted to explore the multilevel mechanisms contributing to social and emotional development in individuals with DDX3X variants, and consider whether these mechanisms are specific to this genetic diagnosis or shared with a subset of people with ID due to other causes.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".