Reserve-building activities in multiple sclerosis patients and healthy controls: a descriptive study

Carolyn E Schwartz, Armon Ayandeh, Murali Ramanathan, Ralph Benedict, Michael G Dwyer, Bianca Weinstock-Guttman, Robert Zivadinov, Carolyn E Schwartz, Armon Ayandeh, Murali Ramanathan, Ralph Benedict, Michael G Dwyer, Bianca Weinstock-Guttman, Robert Zivadinov

Abstract

Background: Cognitive reserve has been implicated as a possible protective factor in multiple sclerosis (MS) but to date no study has compared reserve-building activities across disease course or to healthy controls. This study aims to describe differences in reserve-building activities across the MS disease course and healthy controls.

Methods: Secondary analysis of a cross-sectional cohort study that included 276 healthy controls, and subjects with clinically isolated syndrome (CIS; n = 67), relapsing-remitting MS (RRMS; n = 358) and secondary progressive MS (PMS; n = 109). Past reserve-building activities were operationalized as occupational attainment and education. Current activities comprised 6 strenuous and 6 non-strenuous activities, including 5 reserve-building activities and television-watching. Multivariate Analysis of Variance models examined group differences in past and current activities, after adjusting for covariates.

Results: There were group differences in past and current reserve-building activities. SPMS patients had lower past reserve-building activities than healthy controls. All forms of MS engaged in fewer strenuous current reserve-building pursuits than healthy controls. RRMS read less than healthy controls. SPMS engaged in fewer job-related non-strenuous activities. All MS groups watched more television than healthy controls.

Conclusions: MS patients show significantly fewer past and present reserve-building activities. Although it is difficult to establish causality without future prospective studies, lifestyle-modifying interventions should prioritize expanding MS patients' repertoire of strenuous and non-strenuous activities.

Figures

Fig. 1
Fig. 1
Strenuous activity scores by disease group. Healthy control scores are adjusted for age, gender, and the other disease groups are adjusted for age, gender, years since symptom onset, education, and occupational attainment
Fig. 2
Fig. 2
Non-strenuous activity scores by disease group. Healthy control scores are adjusted for age, gender, and the other disease groups are adjusted for age, gender, years since symptom onset, education, and occupational attainment

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Source: PubMed

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