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Change in Health Literacy over a Decade in a Prospective Cohort of Community-Dwelling Older Adults
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Change in Health Literacy over a Decade in a Prospective Cohort of Community-Dwelling Older Adults
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Journal Article
Change in Health Literacy over a Decade in a Prospective Cohort of Community-Dwelling Older Adults
2021
Overview
BackgroundHealth literacy is often viewed as a static trait in longitudinal studies, which may over or underestimate an individual’s ability to manage one’s health.ObjectivesWe sought to examine health literacy over time among older adults using three widely used measures.DesignA prospective cohort study.ParticipantsCommunity-dwelling adults ages 55 to 74 at baseline with at least one follow-up visit (N = 656) recruited from one academic internal medicine clinic and six community health centers in Chicago, IL.MeasuresHealth literacy was measured using the Test of Functional Health Literacy in Adults (TOFHLA), Newest Vital Sign (NVS), and Rapid Estimate of Adult Literacy in Medicine (REALM) at baseline and up to three follow-up time points.ResultsIn unadjusted analyses, significant changes since baseline were found beginning at the second follow-up (mean (M) = 6.0 years, SD = 0.6) for the TOFHLA (M = − 0.9, SD = 0.95, p = 0.049) and the REALM (M = 0.3, SD = 2.5, p = 0.004) and at the last follow-up (M = 8.6 years, SD = 0.5) for the NVS (M = − 0.2, SD = 1.4, p = 0.02). There were non-linear effects of baseline age on TOFHLA and NVS scores over time (piecewise cubic spline p = 0.01 and p < 0.001, respectively) and no effect on REALM scores (B = 0.02, 95% CI − 0.01 to 0.04, p = 0.17) using multivariable mixed-effects linear regression models, controlling for race, education, income, and comorbidity.ConclusionWe found a negative relationship between age and health literacy over time as measured by the TOFHLA and NVS. Health literacy barriers appear to be more prevalent among individuals in later life, when self-care demands are similarly increasing. Clinicians might consider strategies to assess and respond to limited health literacy, particularly among patients 70 and older. REALM performance remained stable over 10 years of follow-up. This questions whether health literacy tools measure the same attribute. Prospective health literacy studies should carefully consider what measures to use, depending on their objective.
Publisher
Springer Nature B.V
