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Nursing issues
Higher vitamin D intake could improve sleep and cognitive outcomes in older adults with heart failure
  1. Junxin Li
  1. University of Pennsylvania School of Nursing, Philadelphia, Pennsylvania, USA
  1. Correspondence to Dr Junxin Li, University of Pennsylvania School of Nursing, Philadelphia, PA 19104, USA; junxinli{at}

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Commentary on: Song EK and Wu JR. Associations of vitamin D intake and sleep quality with cognitive dysfunction in older adults with heart failure. J Cardiovasc Nurs 2018. doi: 10.1097/JCN.0000000000000469. [Epub ahead of print 29 Mar 2018]

Implications for practice and research

  • Large-scale longitudinal observational and randomised controlled trials are needed to better elucidate the relationship between vitamin D, sleep and cognitive function in older adults.

  • The health benefits of adequate vitamin D intake and recommendations on efficient vitamin D intake from food and supplements need to be incorporated into healthcare provider’s routine health education for older adults/family members.


Substantial evidence in recent years has linked both vitamin D deficiency and poor sleep to cognitive dysfunctions in the older adult population.1 A handful of studies have also associated vitamin D deficiency with sleep disturbances in older adults.2 It is likely that sleep plays an important role in the association …

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  • Competing interests None declared.

  • Provenance and peer review Commissioned; internally peer reviewed.