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Extending the scope of pooled analyses of individual patient biomarker data from heterogeneous laboratory platforms and cohorts using merging algorithms.

TitleExtending the scope of pooled analyses of individual patient biomarker data from heterogeneous laboratory platforms and cohorts using merging algorithms.
Publication TypeJournal Article
Year of Publication2016
AuthorsBurke, O, Benton, S, Szafranski, P, von Dadelszen, P, S Buhimschi, C, Cetin, I, Chappell, L, Figueras, F, Galindo, A, Herraiz, I, Holzman, C, Hubel, C, Knudsen, U, Kronborg, C, Laivuori, H, Lapaire, O, McElrath, T, Moertl, M, Myers, J, Ness, R, Oliveira, L, Olson, G, Poston, L, Ris-Stalpers, C, Roberts, J, Schalekamp-Timmermans, S, Schlembach, D, Steegers, E, Stepan, H, Tsatsaris, V, van der Post, JA, Verlohren, S, Villa, P, Williams, D, Zeisler, H, Redman, C, Staff, A
Corporate AuthorsGlobal Pregnancy Collaboration
JournalPregnancy Hypertens
Date Published2016 Jan
KeywordsAlgorithms, Biomarkers, Blood Chemical Analysis, Calibration, Case-Control Studies, COLAB, Computational Biology, Databases, Factual, Feasibility Studies, Female, Gestational Age, Global Pregnancy Collaboration (CoLab), Humans, Hypertension, Pregnancy-Induced, Observer Variation, Placenta Growth Factor, Predictive Value of Tests, Pregnancy, Reference Values, Reproducibility of Results

BACKGROUND: A common challenge in medicine, exemplified in the analysis of biomarker data, is that large studies are needed for sufficient statistical power. Often, this may only be achievable by aggregating multiple cohorts. However, different studies may use disparate platforms for laboratory analysis, which can hinder merging.

METHODS: Using circulating placental growth factor (PlGF), a potential biomarker for hypertensive disorders of pregnancy (HDP) such as preeclampsia, as an example, we investigated how such issues can be overcome by inter-platform standardization and merging algorithms. We studied 16,462 pregnancies from 22 study cohorts. PlGF measurements (gestational age ⩾20 weeks) analyzed on one of four platforms: R&D Systems, AlereTriage, RocheElecsys or AbbottArchitect, were available for 13,429 women. Two merging algorithms, using Z-Score and Multiple of Median transformations, were applied.

RESULTS: Best reference curves (BRC), based on merged, transformed PlGF measurements in uncomplicated pregnancy across six gestational age groups, were estimated. Identification of HDP by these PlGF-BRCs was compared to that of platform-specific curves.

CONCLUSIONS: We demonstrate the feasibility of merging PlGF concentrations from different analytical platforms. Overall BRC identification of HDP performed at least as well as platform-specific curves. Our method can be extended to any set of biomarkers obtained from different laboratory platforms in any field. Merged biomarker data from multiple studies will improve statistical power and enlarge our understanding of the pathophysiology and management of medical syndromes.

Alternate JournalPregnancy Hypertens
Citation Key577
PubMed ID26955773
Grant ListNIHR-CS-011-020 / / Department of Health / United Kingdom
RP-2014-05-019 / / Department of Health / United Kingdom
/ / Intramural NIH HHS / United States