Associations between olfactory dysfunction and cognition: a scoping review

被引:4
|
作者
Jacobson, Patricia T. [1 ]
Vilarello, Brandon J. [2 ]
Tervo, Jeremy P. [2 ]
Waring, Nicholas A. [2 ]
Gudis, David A. [1 ,2 ]
Goldberg, Terry E. [3 ]
Devanand, D. P. [2 ,3 ]
Overdevest, Jonathan B. [1 ,2 ]
机构
[1] Columbia Univ, Irving Med Ctr, New York Presbyterian, Dept Otolaryngol Head & Neck Surg, New York, NY 10032 USA
[2] Columbia Univ, Vagelos Coll Phys & Surg, New York, NY 10032 USA
[3] Columbia Univ, Irving Med Ctr, New York Presbyterian, Dept Psychiat, New York, NY USA
关键词
Olfaction; Cognition; Young adults; Middle-aged adults; Healthy adults; Semi-objective olfaction testing; ODOR IDENTIFICATION; ALZHEIMERS-DISEASE; PARKINSONS-DISEASE; EXECUTIVE FUNCTION; DEFICITS; SCHIZOPHRENIA; IMPAIRMENT; MEMORY; DISORDERS; DISCRIMINATION;
D O I
10.1007/s00415-023-12057-7
中图分类号
R74 [神经病学与精神病学];
学科分类号
摘要
IntroductionStrong evidence suggests that olfactory dysfunction (OD) can predict additional neurocognitive decline in neurodegenerative conditions such as Alzheimer's and Parkinson's diseases. However, research exploring olfaction and cognition in younger populations is limited. The aim of this review is to evaluate cognitive changes among non-elderly adults with non-COVID-19-related OD.MethodsWe performed a structured comprehensive literature search of PubMed, Ovid Embase, Web of Science, and Cochrane Library in developing this scoping review. The primary outcome of interest was the association between OD and cognitive functioning in adults less than 60 years of age.ResultsWe identified 2878 studies for title and abstract review, with 167 undergoing full text review, and 54 selected for data extraction. Of these, 34 studies reported on populations of individuals restricted to the ages of 18-60, whereas the remaining 20 studies included a more heterogeneous population with the majority of individuals in this target age range in addition to some above the age of 60. The etiologies for smell loss among the included studies were neuropsychiatric disorders (37%), idiopathic cause (25%), type 2 diabetes (7%), trauma (5%), infection (4%), intellectual disability (4%), and other (18%). Some studies reported numerous associations and at times mixed, resulting in a total number of associations greater than the included number of 54 studies. Overall, 21/54 studies demonstrated a positive association between olfaction and cognition, 7/54 demonstrated no association, 25/54 reported mixed results, and only 1/54 demonstrated a negative association.ConclusionMost studies demonstrate a positive correlation between OD and cognition, but the data are mixed with associations less robust in this young adult population compared to elderly adults. Despite the heterogeneity in study populations and outcomes, this scoping review serves as a starting point for further investigation on this topic. Notably, as many studies in this review involved disorders that may have confounding effects on both olfaction and cognition, future research should control for these confounders and incorporate non-elderly individuals with non-psychiatric causes of smell loss.
引用
收藏
页码:1170 / 1203
页数:34
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