Bibliographic record
Abstract
BACKGROUND: Chronic actinic dermatitis (CAD) is a persistent eczematous photodermatitis classically described in older, white men with contact allergy to plants. However, evidence from recent studies suggests that some demographics of CAD patients may be changing. OBJECTIVE: The aims of the study were to determine the frequency of CAD in patients presenting with photosensitive eruptions and to identify the allergens and photoallergens most closely associated with this condition. METHODS: We identified all patients with a diagnosis of CAD from 246 consecutive records of patients undergoing photopatch testing from July 1994 to June 2018 and summarized the demographics and test results in comparison with non-CAD patients. CONCLUSIONS: Nineteen (7.7%) of the 246 patients evaluated had CAD with a male-to-female ratio of 1:1.7 among CAD patients. Compared with non-CAD patients, photocontact allergy and/or contact allergy to sesquiterpene lactone mix and contact allergy to fragrances were significantly more common in CAD. Contact allergy to p-phenylenediamine was also common. The results of this study suggest that CAD presents in a broader demographic range, including both men and women of both light and dark skin types. Phototesting and photopatch testing should be considered when patients present with clinical findings consistent with CAD.
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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 | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.005 | 0.001 |
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".