British Society for Paediatric Dermatology and British Society for Allergy & Clinical Immunology joint session
Bibliographic record
Abstract
[British Society for Paediatric Dermatology and British Society for Allergy & Clinical Immunology joint session. Orals. PA10] Hard domestic water has been reported to worsen atopic eczema (AE) and potentially lead to its development in early life. We conducted a systematic literature review by searching MEDLINE and Embase from inception until October 2016. Human and animal studies were both included. Titles and abstracts were screened and eligible papers reviewed in full. Data were extracted according to a standardized pro forma; 4983 studies were identified and 932 selected for further review. Of these, 10 studies were eligible for inclusion. Studies were not meta-analysed due to methodological heterogeneity. Five cross-sectional studies were identified, conducted in the U.K., Spain, Japan, Denmark and Belgium (n = 358–458 284). All found significant positive associations between high domestic water calcium carbonate levels and AE risk in children, with odds ratios (ORs) ranging between 1.87 and 3.36. One of these studies also suggested that the risk increase was stronger in those carrying a filaggrin skin barrier gene mutation. However, a Spanish birth cohort with 1638 participants did not observe an increased risk of AE with water hardness during 4 years’ follow-up (OR = 0.79, 95% confidence interval 0.45–1.39). Two mechanistic studies in humans found that a higher deposition of the common detergent sodium lauryl sulphate caused skin barrier dysfunction in those exposed to hard vs. softer water. A mechanistic study in 11 dogs with AE washed with shampoo reported improved AE symptoms and skin barrier function with ultrapure soft water vs. hard tap water. Finally, one randomized controlled trial comparing water softeners with standard care in 336 children aged 6 months to 6 years with moderate-to-severe AE did not show a significant improvement in eczema severity with softened water. The majority of observational studies in humans found a positive association between living in a hard-water area and AE. However, once AE is established, using a domestic water softener does not improve disease severity. This does not rule out the potentially important role of water hardness in the initiation of skin inflammation in infancy. We are therefore conducting an intervention study to test whether fitting a water softening device in early life reduces the risk of skin barrier breakdown and AE in high-risk children.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.002 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.002 | 0.002 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.002 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".