PMID- 31603856 OWN - NLM STAT- MEDLINE DCOM- 20200417 LR - 20200417 IS - 2191-0251 (Electronic) IS - 0334-018X (Linking) VI - 32 IP - 11 DP - 2019 Nov 26 TI - The adjustment of 17-hydroxyprogesterone cut-off values for congenital adrenal hyperplasia neonatal screening by GSP according to gestational age and age at sampling. PG - 1253-1258 LID - 10.1515/jpem-2019-0140 [doi] AB - Background Congenital adrenal hyperplasia (CAH) screening is facing great challenges because of a high false-positive rate and a low positive predictive value (PPV). We established and optimized 17-hydroxyprogesterone (17-OHP) cut-off values for CAH neonatal screening using a genetic screening processor (GSP) according to gestational age (GA), birth weight (BW) and age at sampling. Methods The 17-OHP concentrations in dried blood spots were measured by time-resolved immunofluorescence and were grouped in terms of GA, BW and age at sampling for 48,592 newborns. The 99.5th percentile was used to set an initial cut-off value as a reference. Results Significant differences in 17-OHP concentrations were observed among newborns with different GAs and BWs. A significant difference was observed among different sampling age groups. Finally, we defined new multitier cut-off concentrations based on GA and age at sampling. Application of the new cut-off values resulted in a 30% reduction of the positive rate and a 40% increase of the PPV. Conclusions GA, BW and sampling age time influenced the concentrations of 17-OHP. The efficiency of congenital adrenal hyperplasia screening can be substantially improved by adjusting the multitier cut-off value according to GA and age at sampling. FAU - Jiang, Xiang AU - Jiang X AD - Guangzhou Newborn Screening Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, P.R. China. FAU - Tang, Fang AU - Tang F AD - Guangzhou Newborn Screening Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, P.R. China. FAU - Feng, Yi AU - Feng Y AD - Guangzhou Newborn Screening Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, P.R. China. FAU - Li, Bei AU - Li B AD - Guangzhou Newborn Screening Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, P.R. China. FAU - Jia, Xuefang AU - Jia X AD - Guangzhou Newborn Screening Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, P.R. China. FAU - Tang, Chengfang AU - Tang C AD - Guangzhou Newborn Screening Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, P.R. China. FAU - Liu, Sichi AU - Liu S AD - Guangzhou Newborn Screening Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, P.R. China. FAU - Huang, Yonglan AU - Huang Y AD - Guangzhou Newborn Screening Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510180, Guangdong Province,P.R. China, Phone/Fax: +86-20-81330406. LA - eng PT - Journal Article PL - Germany TA - J Pediatr Endocrinol Metab JT - Journal of pediatric endocrinology & metabolism : JPEM JID - 9508900 RN - 0 (Biomarkers) RN - 68-96-2 (17-alpha-Hydroxyprogesterone) SB - IM MH - 17-alpha-Hydroxyprogesterone/*blood MH - Adrenal Hyperplasia, Congenital/blood/*diagnosis/epidemiology MH - Age Factors MH - Aged MH - Biomarkers/*blood MH - False Positive Reactions MH - Female MH - Follow-Up Studies MH - Genetic Testing/*standards MH - Gestational Age MH - Humans MH - Infant, Newborn MH - Neonatal Screening/*methods/*standards MH - Predictive Value of Tests OTO - NOTNLM OT - age at sampling OT - birth weight OT - congenital adrenal hyperplasia OT - gestational age OT - neonatal 17-hydroxyprogesterone OT - neonatal screening EDAT- 2019/10/12 06:00 MHDA- 2020/04/18 06:00 CRDT- 2019/10/12 06:00 PHST- 2019/03/25 00:00 [received] PHST- 2019/08/12 00:00 [accepted] PHST- 2019/10/12 06:00 [pubmed] PHST- 2020/04/18 06:00 [medline] PHST- 2019/10/12 06:00 [entrez] AID - /j/jpem.ahead-of-print/jpem-2019-0140/jpem-2019-0140.xml [pii] AID - 10.1515/jpem-2019-0140 [doi] PST - ppublish SO - J Pediatr Endocrinol Metab. 2019 Nov 26;32(11):1253-1258. doi: 10.1515/jpem-2019-0140.