Clinical Response to Cat Allergen in a Mobile Compared to a Fixed Naturalistic Exposure Chamber <sup>™</sup>
Bibliographic record
Abstract
Introduction: The Red Maple Trials Naturalistic Exposure Chamber™ (NEC™) is a fixed, live-cat exposure chamber, wherein allergen shed from two resident cats is aerosolized using a modified robot vacuum. The EnviroMini™ is a portable allergen exposure tent, in which allergen (Fel d 1, primarily) from milled cat hair is aerosolized in a similar manner. This is a single-center validation study designed to compare the allergic response to cat antigen provocation in the EnviroMini to the response in the previously validated NEC. Methods: Eight cat allergic subjects were randomized to undergo sequential 2-h allergen challenges in the EnviroMini and the NEC, 28 or more days apart. A modified robot vacuum aerosolized cat allergen in both chambers. Airborne Fel d 1 was measured using ELISA. Nasal, ocular, and chest symptoms were recorded every 10 min and spirometry every 20 min. Challenges were stopped and not repeated if FEV1 fell >20% of baseline during the exposure. Results: Fifteen subjects completed at least one challenge, and eight completed both (“per-protocol”). Mean total nasal symptom score (TNSS) averaged over the last 30 min (“plateau”) was not significantly different between the EnviroMini and NEC (paired t test, p = 0.16; mean [SE] 6.1 [1.2] and 4.5 [0.6], EnviroMini and NEC, respectively). There was no difference in FEV1 change between the two challenges (p = 0.90). The same results were found for all subjects as for the per-protocol group. TNSS plateau was not correlated with Fel d 1 exposure, and there was no difference in average Fel d 1 concentrations between the chambers (EnviroMini: 55; NEC: 54 ng/m3). Conclusion: The EnviroMini offers comparable cat allergen exposure and nasal and respiratory responses to the NEC. Its portability facilitates expansion to multisite chamber studies for clinical validation of allergy therapies. Future work could expand its capabilities to other aeroallergens.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 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 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 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 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".