Narrowband <scp>UVB</scp> as an effective substitute for psoralen plus <scp>UVA</scp>: lessons from a psoralen shortage
Bibliographic record
Abstract
From March to August 2010, there was a shortage of encapsulated liquid 8-methoxypsoralen (8-MOP), the psoralen used for bath psoralen plus UVA (PUVA) in Toronto, Canada. Patients were forced to discontinue bath PUVA treatment and were transitioned to other therapeutic modalities, including narrowband UVB (nbUVB). A retrospective chart review was conducted of all patients who discontinued bath PUVA due to the unavailability of 8-MOP, with a focus on those who were switched to nbUVB. Sixty-three patients discontinued PUVA, 39 of whom were switched to nbUVB. Fifteen of 17 patients with mycosis fungoides (MF) who were switched to nbUVB improved, and patients with earlier-stage disease were more likely to improve. Ten of 13 (77%) psoriasis patients improved with nbUVB, including two patients whose psoriasis cleared completely. All three small-plaque parapsoriasis patients who switched to nbUVB had complete clearance of their lesions. In conclusion, nbUVB may be a suitable alternative for patients with MF, small-plaque parapsoriasis and psoriasis who cannot access PUVA therapy.
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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 | 0.001 | 0.004 |
| Meta-epidemiology (narrow) | 0.002 | 0.002 |
| Meta-epidemiology (broad) | 0.004 | 0.001 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.001 | 0.003 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.002 | 0.002 |
| Insufficient payload (model declined to judge) | 0.001 | 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; both teacher heads agree on what is shown here.
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".