Peanut challenge: a retrospective study of 140 patients
Why this work is in the frame
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Bibliographic record
Abstract
BACKGROUND: Accurate diagnosis of peanut allergy is essential given that it is a lifelong and potentially fatal food allergy. Diagnosis relies on patient history, prick skin test (PST), and in many situations, food challenge. More information is required on the safety of food challenge and the informational value of a PST. OBJECTIVES: Primary: to assess the safety of peanut challenges. Secondary: to estimate the sensitivity, specificity, and the positive and negative predictive values of PST to peanut performed in those who underwent a peanut challenge. METHODS: A retrospective study of peanut challenges performed at a tertiary care paediatric hospital allergy clinic between January 1994 and November 1998. RESULTS: Of the 140 peanut challenges performed on 140 patients, 18 were positive. The most frequent adverse clinical effects of positive peanut challenges were: urticaria, oropharyngeal irritation, rhinitis, vomiting and abdominal pain. Among the 18 patients who had a positive result, 10 required medical treatment (antihistamines, +/- epinephrine, +/- salbutamol) to control the allergic reaction. The sensitivity, specificity, and the positive and negative predictive values of PST to peanut in this group of children undergoing a peanut challenge were 100%, 62.3%, 28.1% and 100%, respectively. CONCLUSIONS: Given the poor positive predictive value and specificity of PST, a peanut challenge is usually required to diagnose peanut allergy with certainty when the PST is positive. In cases of a clear history of anaphylaxis to peanut and a positive PST, challenges are unwarranted. When the history is strongly suggestive and the PST is borderline positive, i.e. 3 or 4 mm, peanut challenge is generally necessary to confirm the diagnosis. Given the excellent negative predictive value and sensitivity of PST, a blinded peanut challenge is usually unnecessary in the context of a negative PST except for patients with a history strongly suggestive of immediate hypersensitivity. These patients should be individually assessed for the need to undergo a blinded challenge. The peanut challenge is a useful and safe diagnostic tool when performed by qualified personnel under appropriate conditions.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 it