Olfaction and declarative memory in aging: A meta-analysis

Jobin, B., Roy-Côté, F., Frasnelli, J. et Boller, B. (2023). Olfaction and declarative memory in aging: A meta-analysis. Chemical Senses, 48 . Article bjad045. ISSN 0379-864X 1464-3553 DOI 10.1093/chemse/bjad045

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Résumé

Abstract
Olfactory and declarative memory performances are associated, as both functions are processed by overlapping medial-temporal and prefrontal structures and decline in older adults. While a decline in olfactory identification may be related to a decline in declarative memory, the relationship between olfactory detection threshold and declarative memory remains unclear. In this meta-analysis, we assessed (i) the relationship between olfactory identification/detection threshold and verbal declarative memory in cognitively normal older adults, and (ii) the effect of age on these relationships. We included articles from PsychNet, PubMed, and Academic Search Complete according to the following criteria: (i) inclusion of cognitively normal older adults; (ii) assessment of episodic or semantic memory; and (iii) assessment of olfactory identification or detection threshold. Seventeen studies and 22 effect sizes were eligible and included in this meta-analysis. Olfactory identification was associated with episodic (small effect size: r = 0.19; k = 22) and semantic memory (small effect size: r = 0.16; k = 23). Similarly, the olfactory detection threshold was associated with both episodic (small to medium effect size: r = 0.25; k = 5) and semantic memory (small effect size: r = 0.17; k = 7). Age was found to moderate the relationship between olfactory detection threshold and memory performance. Both olfactory identification and detection threshold performances are associated with declarative memory in older adults, and age only moderates the relationship between olfactory detection threshold and declarative memory performances.

Type de document:	Article
Mots-clés libres:	Olfaction Episodic memory Semantic memory Aging Meta-analysis
Date de dépôt:	19 févr. 2026 18:33
Dernière modification:	19 févr. 2026 18:33
Version du document déposé:	Post-print (version corrigée et acceptée)
URI:	https://depot-e.uqtr.ca/id/eprint/12629

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