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Association between 25-hydroxyvitamin D levels and cognitive performance in middle-aged and older European men
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  • Published on:
    Re: Does vitamin D status effect interact with smoking habits re cognition?

    Dear Editor,

    In response to B.Boucher's interesting question of whether we found smoking to be associated with worsened cognitive performance at higher serum 25-(OH)D concentrations than would be the case in non-smokers...

    1. Although smokers had lower PTH levels than non-smokers (ca. 0.1 SD), this difference was non-signifcant following adjustment for age.

    2. We found no evidence of a 25(OH)D...

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    Conflict of Interest:
    None declared.
  • Published on:
    Does vitamin D status effect interact with smoking habits re cognition?

    Dear Editor,

    This interesting paper adjusts for smoking and smoking reduces circulating parathyroid hormone concentration; this effect would be expected to reduce vitamin D activation(1). One might, therefore, expect smoking to be associated with worsened cognitive performance at a higher serum 25-(OH)D concentration than would be the case in non-smokers. Can the authors tell us, therefore, whether there is any...

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    Conflict of Interest:
    None declared.