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Boy/girl differences in risk for reading disability: potential clues?
J L St Sauver1, S K Katusic, W J Barbaresi
1Department of Health Sciences Research, Section of Clinical Epidemiology, Mayo Clinic Rochester, Rochester, MN 55905, USA.
American Journal of Epidemiology
|October 30, 2001
Summary
Risk factors for reading disability (RD) affect boys and girls differently. Low birth weight and maternal education increased RD risk in girls, while paternal education impacted boys. These findings suggest distinct biological pathways for RD in each sex.
Area of Science:
- Neuroscience
- Developmental Psychology
- Pediatrics
Background:
- Reading disability (RD) is a complex neurodevelopmental disorder affecting a significant portion of the population.
- Understanding sex-specific risk factors for RD is crucial for targeted interventions and research.
- Previous studies have yielded inconsistent findings regarding gender differences in RD etiology.
Purpose of the Study:
- To investigate whether known risk factors for reading disability (RD) exhibit differential associations in boys versus girls.
- To identify specific environmental and demographic factors that may uniquely contribute to RD risk in each sex.
- To explore potential sex-based differences in the underlying biological mechanisms of RD.
Main Methods:
- A population-based case-control study was conducted using data from 5,701 children born in Olmsted County, Minnesota, between 1976 and 1982.
- Reading disability (RD) cases (n=303) were identified using intelligence quotient and achievement test scores from comprehensive records.
- Multivariable logistic regression models were employed to examine associations between potential risk factors and RD, stratified by sex.
Main Results:
- Low birth weight was associated with a >2-fold increased odds of RD in girls (OR=2.94, 95% CI: 1.09, 6.25).
- Maternal education of 12 years or less increased RD odds by 2-fold in girls (OR=2.14, 95% CI: 1.24, 3.72).
- Paternal education of 12 years or less was linked to increased RD odds in boys (OR=2.28, 95% CI: 1.59, 3.27), while older paternal age (>35) was protective in girls (OR=0.24, 95% CI: 0.06, 0.92).
Conclusions:
- Boys and girls demonstrate differential susceptibility to specific risk factors for reading disability (RD).
- These findings suggest that the biological pathways contributing to RD may differ between sexes.
- Further research into sex-specific etiological factors is warranted to inform personalized approaches to RD prevention and treatment.