Trial reportAnnals of internal medicine2021
The Effects of Four Doses of Vitamin D Supplements on Falls in Older Adults : A Response-Adaptive, Randomized Clinical Trial.
Trial report in Annals of internal medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02166333 (Vitamin D Supplements to Prevent Falls in Older Adults), which is not on this map. Cited by 52 papers, 5 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Vitamin D Supplements to Prevent Falls in Older Adults: A Dose-Response Trial
Who cites it
52 citing papers in PubMed, 5 syntheses or guidelines pooled it, 89 citations in OpenAlex.
- The 2024 Endocrine Society Guideline on Vitamin D: Comprehensive Summary and Critical Appraisal.Nutrients · 2026Pooled it
- Effect of vitamin D, calcium, or combined supplementation on fall prevention: a systematic review and updated network meta-analysis.BMC geriatrics · 2024Pooled it
- Long-term supplementation with 3200 to 4000 IU of vitamin D daily and adverse events: a systematic review and meta-analysis of randomized controlled trials.European journal of nutrition · 2023Pooled it
- Effect of Vitamin D Supplementation on Risk of Fractures and Falls According to Dosage and Interval: A Meta-Analysis.Endocrinology and metabolism (Seoul, Korea) · 2022Pooled it
- Sex-specific 25-hydroxyvitamin D threshold concentrations for functional outcomes in older adults: PRoject on Optimal VItamin D in Older adults (PROVIDO).The American journal of clinical nutrition · 2021Pooled it
- Associations of Hypertension and Orthostatic Hypotension With Subclinical Cardiovascular Disease.The journals of gerontology. Series A, Biological sciences and medical sciences · 2024Trial
- Timing of orthostatic hypotension and its relationship with falls in older adults.Journal of the American Geriatrics Society · 2023Trial
- The association of vitamin D supplementation and serum vitamin D levels with physical activity in older adults: Results from a randomized trial.Journal of the American Geriatrics Society · 2023Trial
- The effect of high-dose vitamin D supplementation on hepcidin-25 and erythropoiesis in patients with chronic kidney disease.BMC nephrology · 2023Trial
- Effects of Vitamin D on Physical Function: Results From the STURDY Trial.The journals of gerontology. Series A, Biological sciences and medical sciences · 2022Trial
- The effects of vitamin D supplementation on frailty in older adults at risk for falls.BMC geriatrics · 2022Trial
- Effects of Vitamin D Supplementation on Orthostatic Hypotension: Results From the STURDY Trial.American journal of hypertension · 2022Trial
- A/B design testing of a clinical trial recruitment website: A pilot study to enhance the enrollment of older adults.Contemporary clinical trials · 2021Trial
- Vitamin D supplementation and risk of falling: outcomes from the randomized, placebo-controlled D-Health Trial.Journal of cachexia, sarcopenia and muscle · 2021Trial
- The effects of vitamin D supplementation on types of falls.Journal of the American Geriatrics Society · 2021Trial
- Association between serum 25-hydroxyvitamin D levels and bilateral vestibulopathy: A case-control study.Clinics (Sao Paulo, Brazil) · 2026Article
- Revisiting the Role of Vitamin D in Fracture Prevention in the Era of Mega-Trials.Endocrinology and metabolism (Seoul, Korea) · 2026Review
- Vitamin D deficiency and disease conditions relevant to: Orthopaedic translation.Journal of orthopaedic translation · 2026Review
- Low Vitamin D Status and Post-Stroke Depression, Falls, and Functional Recovery in Older Adults with Nonvalvular Atrial Fibrillation-Associated Ischemic Stroke.Clinical interventions in aging · 2026Article
- Philippine Clinical Practice Guidelines for Periodic Health Examination: Screening for Musculoskeletal Disorders.Acta medica Philippina · 2026Article
Corrections and comments
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Authors and funding
22 authors at 4 institutions in 1 country.
Funding
Abstract
backgroundVitamin D supplementation may prevent falls in older persons, but evidence is inconsistent, possibly because of dosage differences.
objectiveTo compare the effects of 4 doses of vitamin D
design2-stage Bayesian, response-adaptive, randomized trial. (ClinicalTrials.gov: NCT02166333).
setting2 community-based research units.
participants688 participants, aged 70 years and older, with elevated fall risk and a serum 25-hydroxyvitamin D [25-(OH)D] level of 25 to 72.5 nmol/L.
intervention200 (control), 1000, 2000, or 4000 IU of vitamin D MEASUREMENTS: Time to first fall or death over 2 years (primary outcome).
resultsDuring the dose-finding stage, the primary outcome rates were higher for the 2000- and 4000-IU/d doses than for the 1000-IU/d dose, which was selected as the best dose (posterior probability of being best, 0.90). In the confirmatory stage, event rates were not significantly different between participants with experience receiving the best dose (events and observation time limited to the period they were receiving 1000 IU/d; LIMITATIONS: The control group received 200 IU of vitamin D
conclusionIn older persons with elevated fall risk and low serum 25-(OH)D levels, vitamin D PRIMARY FUNDING SOURCE: National Institute on Aging.
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.