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Article

Harmonizing Newborn Screening Laboratory Proficiency Test Results Using the CDC NSQAP Reference Materials

by
Charles Austin Pickens
1,
Maya Sternberg
1,
Mary Seeterlin
2,
Víctor R. De Jesús
3,
Mark Morrissey
4,
Adrienne Manning
5,
Sonal Bhakta
6,
Patrice K. Held
7,
Joanne Mei
1,
Carla Cuthbert
1 and
Konstantinos Petritis
1,*
1
Centers for Disease Control and Prevention, Division of Laboratory Sciences, Newborn Screening and Molecular Biology Branch, MS F19, Atlanta, GA 30341, USA
2
Michigan Department of Community Health, Lansing, MI 49221, USA
3
Centers for Disease Control and Prevention, Division of Laboratory Sciences, Tobacco and Volatiles Branch, Atlanta, GA 30341, USA
4
Wadsworth Center/New York State Department of Health, Albany, NY 12201-0509, USA
5
Katherine A. Kelley State Public Health Laboratory, Connecticut Department of Public Health, Rocky Hill, CT 06067, USA
6
Arizona Department of Health Services, Office of Newborn Screening, Phoenix, AZ 85007, USA
7
Wisconsin State Laboratory of Hygiene, University of Wisconsin School of Medicine and Public Health, Madison, WI 53726, USA
*
Author to whom correspondence should be addressed.
Int. J. Neonatal Screen. 2020, 6(3), 75; https://doi.org/10.3390/ijns6030075
Submission received: 7 August 2020 / Revised: 3 September 2020 / Accepted: 12 September 2020 / Published: 17 September 2020
(This article belongs to the Special Issue Newborn Screening: Promoting Quality to Optimise Benefit and Reduce Harm)
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Abstract

Newborn screening (NBS) laboratories cannot accurately compare mass spectrometry-derived results and cutoff values due to differences in testing methodologies. The objective of this study was to assess harmonization of laboratory proficiency test (PT) results using quality control (QC) data. Newborn Screening Quality Assurance Program (NSQAP) QC and PT data reported from 302 laboratories in 2019 were used to compare results among laboratories. QC materials were provided as dried blood spot cards which included a base pool and the base pool enriched with specific concentrations of metabolites in a linear range. QC data reported by laboratories were regressed on QC data reported by the Centers for Disease Control and Prevention (CDC), and laboratory’s regression parameters were used to harmonize their PT result. In general, harmonization tended to reduce overall variation in PT data across laboratories. The metabolites glutarylcarnitine (C5DC), tyrosine, and phenylalanine were displayed to highlight inter- and intra-method variability in NBS results. Several limitations were identified using retrospective data for harmonization, and future studies will address these limitations to further assess feasibility of using NSQAP QC data to harmonize PT data. Harmonizing NBS data using common QC materials appears promising to aid result comparison between laboratories.
Keywords: mass spectrometry; normalization; newborn screening; proficiency testing; metabolite mass spectrometry; normalization; newborn screening; proficiency testing; metabolite

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MDPI and ACS Style

Pickens, C.A.; Sternberg, M.; Seeterlin, M.; De Jesús, V.R.; Morrissey, M.; Manning, A.; Bhakta, S.; Held, P.K.; Mei, J.; Cuthbert, C.; et al. Harmonizing Newborn Screening Laboratory Proficiency Test Results Using the CDC NSQAP Reference Materials. Int. J. Neonatal Screen. 2020, 6, 75. https://doi.org/10.3390/ijns6030075

AMA Style

Pickens CA, Sternberg M, Seeterlin M, De Jesús VR, Morrissey M, Manning A, Bhakta S, Held PK, Mei J, Cuthbert C, et al. Harmonizing Newborn Screening Laboratory Proficiency Test Results Using the CDC NSQAP Reference Materials. International Journal of Neonatal Screening. 2020; 6(3):75. https://doi.org/10.3390/ijns6030075

Chicago/Turabian Style

Pickens, Charles Austin, Maya Sternberg, Mary Seeterlin, Víctor R. De Jesús, Mark Morrissey, Adrienne Manning, Sonal Bhakta, Patrice K. Held, Joanne Mei, Carla Cuthbert, and et al. 2020. "Harmonizing Newborn Screening Laboratory Proficiency Test Results Using the CDC NSQAP Reference Materials" International Journal of Neonatal Screening 6, no. 3: 75. https://doi.org/10.3390/ijns6030075

APA Style

Pickens, C. A., Sternberg, M., Seeterlin, M., De Jesús, V. R., Morrissey, M., Manning, A., Bhakta, S., Held, P. K., Mei, J., Cuthbert, C., & Petritis, K. (2020). Harmonizing Newborn Screening Laboratory Proficiency Test Results Using the CDC NSQAP Reference Materials. International Journal of Neonatal Screening, 6(3), 75. https://doi.org/10.3390/ijns6030075

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