Abstract
Brain fog (ie, memory complaints and concentration difficulties) is frequently reported during the menopausal transition. There is lack of standardized scales available to measure brain fog across the menopausal transition. This study aimed to evaluate the factor structure of the Everyday Memory Questionnaire-Revised (EMQ-R) and to determine the most commonly reported everyday cognitive symptoms in a menopausal population. Four hundred seventeen eligible women aged from 40 to 60 years (107 premenopausal, 149 perimenopausal, and 161 early postmenopausal) were recruited from the general community and were included in the analyses. Confirmatory factor analysis was conducted to test the model fit of the bifactor structure (ie, 4-item attentional subscale ranged 0-16, 7-item retrieval subscale ranged 0-28) of the 13-item EMQ-R (ranged 0-52) in a menopausal populations. Typical items in the retrieval subscale include "difficulty finding words," the attentional subscale include "difficulty following the thread of a story," and analysis of variance and multivariate analysis of covariance were used to investigate the group differences of individual items and two subscales. Confirmatory factor analysis indicated the bifactor structure of the EMQ-R has a good fit in all three groups. A significant difference was identified in the mean retrieval scores (pre: 11.8, peri: 13.6, early post: 11.7) but not in the mean attentional scores (pre: 4.53, peri: 5.01, early post: 4.65). The EMQ-R retrieval subscale may serve as a potential instrument to assess memory retrieval symptoms that contribute to "brain fog" in menopause. Increased memory retrieval complaints reported by the perimenopausal group suggests a transition-related memory retrieval dysfunction during menopausal transition.
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