Maternal vitamin D : a systematic review of associations and deficiencies, an investigation of early childhood caries in northern Manitoba, and a proposed study of prenatal vitamin D status and enamel hypoplasia in infants
Bibliographic record
Abstract
To review the role of 25(OH)D in health, its sources, and review the problem of vitamin D deficiency in Manitoba.o To identify those factors associated with matemal 25(OH)D during pregnancy.o To determine whether vitamin D deficiency has been documented during pregnancy.o To review the relationship between vitamin D supplementation, enamel hlpoplasia and ECC.A community with documented widespread vitamin D deficiency was studied.o To propose a longitudinal study to identify whether analogous levels of vitamin D during pregnancy exist in an urban Aboriginal population, and to investigate the relationship between prenatal vitamin D status and enamel hypoplasia.Results: Strong evidence exists that maternal concentrations are associated with vitamin supplementation during pregnancy, ethnicity, season, and sun exposure.lntermediate evidence supports the association between maternal 25(OH)D and diet, religious practice, stage of pregnancy, and geography, while little or no evidence supports associations with socioeconomic status, maternal age, gravid history, number of fetuses, and antenatal care.There was sufficient evidence to state that maternal-fetal and maternal-infant concentrations are correlated.Studies from all regions of the globe reported matemal concentrations <35nmoVl, indicating that many women are vitamin D deficient during pregnancy, leaving their developing fetuses at risk of incomplete development. VI ACKNO\ryLEDGEMENTSCompleting this thesis would not have been possible without the support, encouragement, and guidance of my thesis committee.I would especially like to thank my supervisor
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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 | 0.004 | 0.019 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.003 | 0.003 |
| Bibliometrics | 0.012 | 0.020 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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".