Cleft lip/palate and educational attainment: cause, consequence or correlation? A Mendelian randomization study.
Int J Epidemiol
; 49(4): 1282-1293, 2020 08 01.
Article
em En
| MEDLINE
| ID: mdl-32373937
ABSTRACT
BACKGROUND:
Previous studies have found that children born with a non-syndromic orofacial cleft have lower-than-average educational attainment. Differences could be due to a genetic predisposition to low intelligence and academic performance, factors arising due to the cleft phenotype (such as social stigmatization, impaired speech/language development) or confounding by the prenatal environment. A clearer understanding of this mechanism will inform interventions to improve educational attainment in individuals born with a cleft, which could substantially improve their quality of life. We assessed evidence for the hypothesis that common variant genetic liability to non-syndromic cleft lip with or without cleft palate (nsCL/P) influences educational attainment.METHODS:
We performed a genome-wide association study (GWAS) meta-analysis of nsCL/P with 1692 nsCL/P cases and 4259 parental and unrelated controls. Using GWAS summary statistics, we performed Linkage Disequilibrium (LD)-score regression to estimate the genetic correlation between nsCL/P, educational attainment (GWAS n = 766 345) and intelligence (GWAS n = 257 828). We used two-sample Mendelian randomization to evaluate the causal effects of genetic liability to nsCL/P on educational attainment and intelligence.RESULTS:
There was limited evidence for shared genetic aetiology or causal relationships between nsCL/P and educational attainment [genetic correlation (rg) -0.05, 95% confidence interval (CI) -0.12 to 0.01, P 0.13; MR estimate (ßMR) -0.002, 95% CI -0.009 to 0.006, P 0.679) or intelligence (rg -0.04, 95% CI -0.13 to 0.04, P 0.34; ßMR -0.009, 95% CI -0.02 to 0.002, P 0.11).CONCLUSIONS:
Common variants are unlikely to predispose individuals born with nsCL/P to low educational attainment or intelligence. This is an important first step towards understanding the aetiology of low educational attainment in this group.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Fenda Labial
/
Fissura Palatina
Tipo de estudo:
Clinical_trials
/
Observational_studies
/
Risk_factors_studies
/
Systematic_reviews
Limite:
Child
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Female
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Humans
/
Pregnancy
Idioma:
En
Revista:
Int J Epidemiol
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Reino Unido