Plasma vitamin d levels and cognitive function in aging women: The nurses' health study

被引:31
作者
Bartali, B. [1 ,2 ]
Devore, E. [1 ]
Grodstein, F. [1 ]
Kang, J. H. [1 ]
机构
[1] Harvard Univ, Brigham & Womens Hosp, Sch Med, Dept Med,Channing Lab, Boston, MA 02115 USA
[2] New England Res Inst, Watertown, MA 02172 USA
基金
美国国家卫生研究院;
关键词
Vitamin D; cognitive function; women's health; D-RECEPTOR GENE; 25-HYDROXYVITAMIN D; ALZHEIMERS-DISEASE; D DEFICIENCY; CARDIOVASCULAR-DISEASE; ELDERLY SUBJECTS; RAT HIPPOCAMPUS; OLDER WOMEN; DECLINE; RISK;
D O I
10.1007/s12603-013-0409-9
中图分类号
R592 [老年病学]; C [社会科学总论];
学科分类号
03 ; 0303 ; 100203 ;
摘要
Vitamin D may play a role in preserving cognitive function. However, there is a paucity of prospective studies on the relationship between vitamin D and cognition with aging. The aim of this study was to examine the association between plasma levels of vitamin D and subsequent cognitive function. This is a prospective study including 1,185 women aged 60-70 years from the Nurses' Health Study, who had plasma 25-hydroxy-vitamin D levels measured in 1989-1990 and completed an initial Telephone Interview of Cognitive Status approximately 9 years later. Subsequently, three follow-up cognitive assessments were conducted at 1.5-2.0 years intervals. We used multivariable-adjusted linear regression to model initial cognitive function, and mixed linear regression to model change in cognitive function over time. Lower vitamin D levels were associated with significantly worse cognitive function 9 years later. For example, the mean global composite score averaging all the cognitive tests was 0.20 lower (95% Confidence Interval (CI):-0.33,-0.08; p-trend=0.009) in women in the lowest quintile (median=14.1 ng/mL) compared with women in the highest quintile of vitamin D (median=38.4 ng/mL). The observed differences were equivalent to the effect estimates we found for women who were approximately 4-6 years apart in age. However, vitamin D levels were not significantly associated with subsequent cognitive decline during 6 years of follow-up. Higher levels of plasma vitamin D in women aged 60-70 years were associated with better cognitive function about a decade later but were not associated with cognitive decline during 6 years of follow-up.
引用
收藏
页码:400 / 406
页数:7
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