Diagnostic testing for α‐globin gene disorders in a heterogeneous North American population
Bibliographic record
Abstract
Adult hemoglobin is a heterotetramer composed of two α-globin chains and two β-globin chains (α2 β2 ), each of which contains a heme molecule capable of binding oxygen and facilitating oxygen transport. The α-globin chains are expressed from duplicated genes within a tandem gene cluster located on chromosome region 16p13.3. High-level expression of the α-globin genes commences early in fetal development and continues throughout life. The α-thalassemia syndromes are among the most single-gene disorders, resulting from decreased synthesis of α-globin chains or synthesis of functionally abnormal α-globin chains. These disorders are most common in South East Asia, but also occur in many other populations. The most common cause of α-thalassemia is gene deletions, of which more than seventy have been reported. In addition, a small but significant proportion of cases involve point mutations of the α-globin genes. Ideally, the diagnostic strategy should include allele-specific assays for commonly occurring deletions, as well as methods for detection of rare or novel deletions and point mutations. Here we provide an overview of the diagnostic methods available and our experience using these assays in a reference laboratory serving a heterogeneous at-risk population.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.002 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".