Distribution and status of vitamin B12 in Chinese adults with hypertension: a comprehensive report across 14 provinces
Bibliographic record
Abstract
Background: Vitamin B12 (VB12) is an essential biomarker for population health, and its deficiency status leads to severe health burdens. A comprehensive and updated investigation on the distribution of VB12 levels and status is critically needed to address public health and clinical concerns. Methods: We conducted a cross-sectional analysis using data obtained from the Precision Medical Program, which encompassed 14 provinces in China. Specific criteria based on previously published cutoffs and our study population’s characteristics are adopted to define B12 deficiency. Biochemical B12 deficiency was identified with circulating VB12 levels <148 pmol/L. Metabolic B12 deficiency was determined with circulating VB12 levels ≥148 and ≤258 pmol/L with concomitant elevated plasma total homocysteine (tHcy ≥14 µmol/L). Normal B12 status included VB12 levels >258 pmol/L or VB12 levels ranging from 148 to 258 pmol/L with tHcy levels below 14 µmol/L. VB12 levels and status were analyzed and stratified by age, sex, and geographical region. Results: This study enrolled a total of 2174 hypertensive adults, with a mean age of 63.0 years (±13.4) and 45.8% female. The overall mean VB12 levels were 322.3 (85.0) pmol/L. The prevalence rates of B12 biochemical deficiency, metabolic deficiency, metabolic deficiency with excluded renal dysfunction, and adequate status were 0.7%, 13.3%, 11.5%, and 85.9%, respectively. Females exhibited higher VB12 levels than males, with a β value of 19.72 (95% confidence interval [CI], 10.59–28.84) in the multivariate model. The southern population demonstrated higher VB12 levels than people from the north, with a β value of −18.14 (95% CI, −25.72 to −10.76). Males had a higher prevalence of metabolic VB12 deficiency in comparison to females (15.8% vs. 10.4%). Conclusions: Our study revealed that Chinese hypertensive adults exhibit relatively higher levels of VB12. Additionally, while biochemical B12 deficiency is uncommon, a noteworthy proportion of individuals were affected by metabolic VB12 deficiency. This study has important implications for nutritional counseling and vitamin B supplement strategies.
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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 | 0.001 |
| Bibliometrics | 0.002 | 0.003 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".