Health literacy and patient outcomes in chronic kidney disease: a systematic review

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Abstract

Limited health literacy affects 25% of people with chronic kidney disease (CKD), and may reduce self-management skills resulting in poorer clinical outcomes. By disproportionately affecting people with low socio-economic status and non-white ethnicity, limited health literacy may promote health inequity.

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Most cited references 26

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Clinical epidemiology of cardiovascular disease in chronic renal disease.

RN Foley, PS Parfrey, MJ Sarnak (1998)

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Interventions for individuals with low health literacy: a systematic review.

K. Boyd Crotty, Stacey L Sheridan, Nancy D Berkman … (2010)

The U.S. Department of Health and Human Services recently called for action on health literacy. An important first step is defining the current state of the literature about interventions designed to mitigate the effects of low health literacy. We performed an updated systematic review examining the effects of interventions that authors reported were specifically designed to mitigate the effects of low health literacy. We searched MEDLINE®, The Cumulative Index to Nursing and Allied Health Literature (CINAHL), PsycINFO, Educational Resources Information Center (ERIC), and the Cochrane Library databases (2003 forward for health literacy; 1966 forward for numeracy). Two reviewers independently reviewed titles, abstracts, and full-text articles for inclusion and included studies that examined outcomes by health literacy level and met other pre-specified criteria. One reviewer abstracted article information into evidence tables; a second checked accuracy. Two reviewers independently rated study quality using predefined criteria. Among 38 included studies, we found multiple discrete design features that improved comprehension in one or a few studies (e.g., presenting essential information by itself or first, presenting information so that the higher number is better, adding icon arrays to numerical information, adding video to verbal narratives). In a few studies, we also found consistent, direct, fair or good-quality evidence that intensive self-management interventions reduced emergency department visits and hospitalizations; and intensive self- and disease-management interventions reduced disease severity. Evidence for the effects of interventions on other outcomes was either limited or mixed. Multiple interventions show promise for mitigating the effects of low health literacy and could be considered for use in clinical practice.

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Low health literacy associates with increased mortality in ESRD.

Tom A Elasy, Svetlana Eden, Kenneth A Wallston … (2010)

Limited health literacy is common in the United States and associates with poor clinical outcomes. Little is known about the effect of health literacy in patients with advanced kidney disease. In this prospective cohort study we describe the prevalence of limited health literacy and examine its association with the risk for mortality in hemodialysis patients. We enrolled 480 incident chronic hemodialysis patients from 77 dialysis clinics between 2005 and 2007 and followed them until April 2008. Measured using the Rapid Estimate of Adult Literacy in Medicine, 32% of patients had limited (<9th grade reading level) and 68% had adequate health literacy (≥9th grade reading level). Limited health literacy was more likely in patients who were male and non-white and who had fewer years of education. Compared with adequate literacy, limited health literacy associated with a higher risk for death (HR 1.54; 95% CI 1.01 to 2.36) even after adjustment for age, sex, race, and diabetes. In summary, limited health literacy is common and associates with higher mortality in chronic hemodialysis patients. Addressing health literacy may improve survival for these patients.