Evaluation of the validity of Hb A(2) and mean corpuscular haemoglobin action values in antenatal screening for beta thalassaemia carriers in England

Yvonne Daniel, Ronwyn Cartwright, Kristian Rennie, Allison Streetly, Jo Howard*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)

    Abstract

    National antenatal screening of all pregnant women in England is carried out using standards and guidelines produced by the National Health Service Sickle Cell and Thalassaemia Screening Programme. The algorithms for detection of beta thalassaemia carrier status rely on action criteria, which are set using the percentage Hb A(2) and mean corpuscular haemoglobin (MCH) values. Three groups of samples: MCH = 27 pg and Hb A(2) 4-4.3% and MCH >= 27 pg and Hb A(2) 3.5-3.9% were selected from a sample population of 59 500 to assess the validity and predictive value of the action criteria - 25 false positives (0.042% of total) and nine false negatives (0.015% of total) were detected. These findings support the continuation of the current action values.

    Original languageEnglish
    Pages (from-to)607-611
    Number of pages5
    JournalBritish Journal of Haematology
    Volume166
    Issue number4
    DOIs
    Publication statusPublished - Aug 2014

    Keywords

    • beta thalassaemia carrier
    • action values
    • antenatal screening
    • MUTATIONS

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