Document Detail

Weight-adjusted neonatal 17OH-progesterone cutoff levels improve the efficiency of newborn screening for congenital adrenal hyperplasia.
MedLine Citation:
PMID:  22218447     Owner:  NLM     Status:  In-Data-Review    
OBJECTIVE: To evaluate weight-adjusted strategy for levels of neonatal-17OHP in order to improve newborn screening (NBS) efficiency.
SUBJECTS AND METHODS: Blood samples collected between 2-7 days of age from 67,640 newborns were evaluated. When N17OHP levels were > 20 ng/mL, and a second sample was requested. We retrospectively analyzed neonatal-17OHP levels measured by Auto DELFIA- B024-112 assay, grouped according to birth-weight: G1: < 1,500 g, G2: 1,501-2,000 g, G3: 2,000-2,500 g and G4: > 2,500 g. 17OHP cutoff values were determined for each group using the 97.5th, 99th, 99.5th and 99.8th percentiles.
RESULTS: 0.5% of newborns presented false-positive results using the cutoff level > 20 ng/mL for all groups. Neonates of low birthweight made up 69% of this group. Seven full-term newborns presented congenital adrenal hyperplasia (CAH) and, except for one of them, 17OHP levels were > 120 ng/mL. Only the 99.8th percentile presented higher predictive positive value (2%), and lower rate of false-positives in all groups.
CONCLUSIONS: We suggest the use of 99.8th percentile obtained by weight-adjusted N17OHP values of healthy newborns to reduce the rate of false-positive results in NBS.
Giselle Hayashi; Cláudia Faure; Maria Fernanda Brondi; Carla Vallejos; Daiana Soares; Erica Oliveira; Vinícius N Brito; Berenice B Mendonca; Tânia A S S Bachega
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Arquivos brasileiros de endocrinologia e metabologia     Volume:  55     ISSN:  1677-9487     ISO Abbreviation:  Arq Bras Endocrinol Metabol     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2012-01-05     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0403437     Medline TA:  Arq Bras Endocrinol Metabol     Country:  Brazil    
Other Details:
Languages:  eng     Pagination:  632-7     Citation Subset:  IM    
Associação de Pais e Amigos dos Excepcionais de São Paulo, São Paulo, SP, Brazil.
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