ArticleEuropean geriatric medicine2025
Prevalence, associated factors, and impact of vitamin B12 deficiency in older medical inpatients.
Article in European geriatric medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
What it found
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Who cites it
2 citing papers in PubMed.
- KDIGO 2026 Clinical Practice Guideline for Anemia in Chronic Kidney Disease (CKD): a commentary from the European Renal Best Practice (ERBP).Nephrology, dialysis, transplantation : official publication of the European Dialysis and Transplant Association - European Renal Association · 2026Article
- Vitamin BNutrients · 2026Review
Corrections and comments
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Authors and funding
3 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeThis retrospective cohort study aims to explore the prevalence of vitamin B12 deficiency in older hospitalized adults and identify key factors associated with this deficiency, as well as its impact on frailty and functional decline.
methodsData were collected from older adults (≥65 years) sequentially admitted to the Internal Medicine Department of a tertiary university hospital. Clinical and laboratory characteristics, including age, sex, somatometric data, cause of admission, past medical history, chronic medication use, and laboratory tests, were recorded. Frailty and functional status were assessed using the Fried Frailty Scale (FFS), Clinical Frailty Scale (CFS), Barthel Index, and Katz Index. Vitamin B12 levels on admission were categorised as deficient (<200 pg/ml), borderline (200-300 pg/ml), normal (300-999 pg/ml), and high (≥1000 pg/ml).
resultsA total of 894 patients were included. The median age was 83 years and 487 (54.5%) were females. The prevalence of vitamin B12 deficiency was found in 9.1%, while 17.3% of the sample had borderline levels. Multivariate analysis identified polypharmacy (≥5 drugs), low albumin levels/Geriatric Nutritional Risk Index (GNRI), and nursing home residency as independent factors associated with low B12 levels. Multivariate analyses showed that B12 deficiency was significantly associated with higher frailty rates and lower functional status.
conclusionVitamin B12 deficiency is prevalent among hospitalized older patients and is significantly associated with increased frailty and reduced functional status. These findings underscore the importance of routine screening for B12 deficiency in this vulnerable population to improve clinical outcomes and quality of life.
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