Testing for JAK2 <sup>V617F</sup> mutation across specimen types yields concordant results
Bibliographic record
Abstract
Chronic myeloproliferative neoplasms (CMPN) are a group of hematopoietic stem cell disorders associated with abnormal blood cell production and bone marrow (BM) morphology. Myeloid cells from the majority of polycythemia vera (PV) patients and approximately half of essential thrombocythemia (ET) and primary myelofibrosis (PMF) patients carry the JAK2 V617F mutation.1-3 Recent proposed revisions to the World Health Organization (WHO) diagnostic criteria for these disorders include the presence of JAK2V617F mutation as a major criterion for diagnosis.4 Although various studies have shown that JAK2 mutation testing can be successfully performed on peripheral blood (PB),1-3 bone marrow aspirate (BMA),5 or BM biopsy,6, 7 comparison of results across different sample types has not been performed.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.015 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.002 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.007 | 0.003 |
| Insufficient payload (model declined to judge) | 0.007 | 0.008 |
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 source (direct Gemma or distilled Codex), 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".