Reference intervals for hemoglobin A1c in pregnant women : data from an Italian multicenter study
Articolo
Data di Pubblicazione:
2006
Citazione:
Reference intervals for hemoglobin A1c in pregnant women : data from an Italian multicenter study / A. Mosca, R. Paleari, M. Dalfra', G. Di Cianni, I. Cuccuru, G. Pellegrini, L. Malloggi, M. Bonomo, S. Granata, F. Ceriotti, M.T. Castiglioni, M. Songini, G. Tocco, M. Masin, M. Plebani, A. Lapolla. - In: CLINICAL CHEMISTRY. - ISSN 0009-9147. - 52:6(2006), pp. 1138-1143.
Abstract:
Background: The reference intervals for hemoglobin A1c (Hb A1c) in pregnant women without diabetes are not well defined, and few examples of reference intervals established by networks of different laboratories are available.
Methods: Five Italian Diabetic Care Units were involved in the study. Data were collected from 445 pregnant women without diabetes, selected on the basis of glucose
challenge test results, and from 384 nonpregnant control women. The Hb A1c measurements were performed with
HPLC systems aligned to the Diabetes Control and Complications Trial. Plasma glucose measurements were also performed locally. Both Hb A1c and glucose measurements were harmonized by running appropriate external quality assessment schemes. The reference intervals
were calculated in terms of nonparametric 2.5th to 97.5th percentiles with 0.90 confidence intervals.
Results: The Hb A1c measurements were reproducible (CV < 2.0%) and accurate [mean (SE) difference from the target values, <0.10 (0.06)%]. Glucose measurements were
also reproducible (mean CV < 3.2%) and accurate [difference from the target values, <0.01 (0.04) mmol/L]. To
calculate common reference intervals, we merged the data collected in the different centers. The Hb A1c reference intervals were 4.0%–5.5% for pregnant nondiabetic women and 4.8%–6.2% for nonpregnant controls.
Conclusions: Healthy pregnant women have lower Hb A1c concentrations than nonpregnant women. The reference intervals for Hb A1c in pregnant women should therefore be lower than those currently in use.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
diabete; gravidanza; emoglobina glicata; intervalli di riferimento
Elenco autori:
A. Mosca, R. Paleari, M. Dalfra', G. Di Cianni, I. Cuccuru, G. Pellegrini, L. Malloggi, M. Bonomo, S. Granata, F. Ceriotti, M.T. Castiglioni, M. Songini, G. Tocco, M. Masin, M. Plebani, A. Lapolla
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