Analysis of cell-free fetal DNA in maternal blood for detection of trisomy 21, 18 and 13 in a general pregnant population and in a high risk population - a systematic review and meta-analysis.
Acta Obstet Gynecol Scand
; 96(1): 7-18, 2017 Jan.
Article
em En
| MEDLINE
| ID: mdl-27779757
ABSTRACT
INTRODUCTION:
The aim of this study was to review the performance of non-invasive prenatal testing (NIPT) for detection of trisomy 21, 18 and 13 (T21, T18 and T13) in a general pregnant population as well as to update the data on high-risk pregnancies. MATERIAL ANDMETHODS:
Systematic review and meta-analysis. PubMed, Embase and the Cochrane Library were searched. Methodological quality was rated using QUADAS and scientific evidence using GRADE. Summary measures of diagnostic accuracy were calculated using a bivariate random-effects model.RESULTS:
In a general pregnant population, there is moderate evidence that the pooled sensitivity is 0.993 (95% CI 0.955-0.999) and specificity was 0.999 (95% CI 0.998-0.999) for the analysis of T21. Pooled sensitivity and specificity for T13 and T18 was not calculated in this population due to the low number of studies. In a high-risk pregnant population, there is moderate evidence that the pooled sensitivities for T21 and T18 are 0.998 (95% CI 0.981-0.999) and 0.977 (95% CI 0.958-0.987) respectively, and low evidence that the pooled sensitivity for T13 is 0.975 (95% CI 0.819-0.997). The pooled specificity for all three trisomies is 0.999 (95% CI 0.998-0.999).CONCLUSIONS:
This is the first meta-analysis using GRADE that shows that NIPT performs well as a screen for trisomy 21 in a general pregnant population. Although the false positive rate is low compared with first trimester combined screening, women should still be advised to confirm a positive result by invasive testing if termination of pregnancy is under consideration.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Diagnóstico Pré-Natal
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Trissomia
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DNA
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Sistema Livre de Células
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Síndrome de Down
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Transtornos Cromossômicos
Tipo de estudo:
Diagnostic_studies
/
Etiology_studies
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Prognostic_studies
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Risk_factors_studies
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Systematic_reviews
Limite:
Female
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Humans
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Pregnancy
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article