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Vitamin D supplementation and falls: a trial sequential meta-analysis.

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Vitamin D supplements do not significantly reduce falls by 15% or more in older adults. Further research is unlikely to change this conclusion, suggesting limited justification for prescribing vitamin D for fall prevention.

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Area of Science:

  • Gerontology
  • Nutritional Science
  • Clinical Trials

Background:

  • Conflicting results exist regarding vitamin D supplementation's efficacy in preventing falls.
  • Previous meta-analyses have yielded inconsistent findings on this outcome.
  • There is a need to evaluate the necessity of further research in this area.

Purpose of the Study:

  • To assess the need for further randomized controlled trials (RCTs) on vitamin D supplementation for fall prevention.
  • To determine if vitamin D, with or without calcium, reduces the risk of falls by a clinically significant margin (15%).

Main Methods:

  • Utilized trial sequential analysis on data from 20 existing RCTs (n=29,535).
  • Applied a risk reduction threshold of 15% and conducted sensitivity analyses with a 10% threshold.
  • Performed subgroup analyses for vitamin D alone and vitamin D with calcium.

Main Results:

  • The effect estimate for vitamin D supplementation fell within the futility boundary for all analyses.
  • Evidence suggests vitamin D does not alter the relative risk of falls by 15% or more.
  • Subgroup analyses for vitamin D and vitamin D with calcium also showed no significant risk reduction.

Conclusions:

  • Pooled analyses indicate that vitamin D supplementation, with or without calcium, does not reduce falls by 15% or more.
  • Future trials with similar methodologies are unlikely to alter current conclusions.
  • There is currently limited evidence to support prescribing vitamin D supplements for fall prevention.