Alternations of vitamin D and cognitive function in first-diagnosed and drug-naïve BD patients: Physical activity as a moderator

J Affect Disord. 2023 Feb 15:323:153-161. doi: 10.1016/j.jad.2022.11.064. Epub 2022 Nov 25.

Abstract

Background: The pathophysiological mechanism of cognitive impairments of bipolar disorder (BD) has not yet been completely revealed. It is well known that Vitamin D and physical activity (PA) are associated with BD. However, specific links between Vitamin D and cognitive deficits in BD are still unclear.

Method: The serum levels of vitamin D were measured. The cognitive performances of 102 first-diagnosed and drug-naïve BD patients were evaluated for analysis. The repeatable battery for the assessment of neuropsychological status (RBANS) and the Stroop Color-Word test was used in this study. PA was collected by international physical activity questionnaire.

Result: Patients with BD had high levels of serum vitamin D. Furthermore, immediate and delayed memory was negatively associated with vitamin D levels in patients' group. The serum levels of vitamin D in patients with low PA were positively associated with memory. However, increased PA attenuated the protective effect of vitamin D on executive cognition.

Conclusion: It is concluded that the increased levels of vitamin D were observed in the serum of patients with BD. Thus, it is found that more PA is less beneficial to cognition of patients with BD than longer resting.

Keywords: Bipolar disorder; Cognitive function; Executive function; Physical activity; Vitamin D.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Bipolar Disorder* / psychology
  • Cognition
  • Exercise
  • Humans
  • Neuropsychological Tests
  • Vitamin D
  • Vitamins

Substances

  • Vitamin D
  • Vitamins