Dataset Information

Health literacy, cognitive ability, and functional health status among older adults.

ABSTRACT:

Objective

To investigate whether previously noted associations between health literacy and functional health status might be explained by cognitive function.

Data sources/study setting

Health Literacy and Cognition in Older Adults ("LitCog," prospective study funded by National Institute on Aging). Data presented are from interviews conducted among 784 adults, ages 55-74 years receiving care at an academic general medicine clinic or one of four federally qualified health centers in Chicago from 2008 to 2010.

Study design

Study participants completed structured, in-person interviews administered by trained research assistants.

Data collection

Health literacy was measured using the Test of Functional Health Literacy in Adults, Rapid Estimate of Adult Literacy in Medicine, and Newest Vital Sign. Cognitive function was assessed using measures of long-term and working memory, processing speed, reasoning, and verbal ability. Functional health was assessed with SF-36 physical health summary scale and Patient Reported Outcomes Measurement Information System short form subscales for depression and anxiety.

Principal findings

All health literacy measures were significantly correlated with all cognitive domains. In multivariable analyses, inadequate health literacy was associated with worse physical health and more depressive symptoms. After adjusting for cognitive abilities, associations between health literacy, physical health, and depressive symptoms were attenuated and no longer significant.

Conclusions

Cognitive function explains a significant proportion of the associations between health literacy, physical health, and depression among older adults. Interventions to reduce literacy disparities in health care should minimize the cognitive burden in behaviors patients must adopt to manage personal health.

SUBMITTER: Serper M

PROVIDER: S-EPMC4111764 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:OBJECTIVES:To investigate the relationship between functional health literacy and glycaemic control in a sample of older patients with type 2 diabetes. DESIGN:Cross-sectional study. SETTING:A government-financed outpatient geriatric clinic in São Paulo, Brazil. PARTICIPANTS:129 older patients with type 2 diabetes, a mean (SD) age of 75.9 (6.2) years, a mean glycosylated haemoglobin (HbA1c) of 7.2% (1.4), of which 14.7% had no formal education and 82.9% had less than a high-school diploma. MEASURES:HbA1c was used as a measure of glycaemic control. Functional health literacy was assessed with the 18-item Short Assessment of Health Literacy for Portuguese-speaking Adults (SAHLPA-18), a validated instrument to evaluate pronunciation and comprehension of commonly used medical terms. Regression models were controlled for demographic data, depressive symptoms, diabetes duration, treatment regimen, diabetes knowledge and assistance for taking medications. RESULTS:Functional health literacy below adequate was encountered in 56.6% of the sample. After controlling for potential confounding factors, patients with inadequate functional health literacy were more likely than patients with adequate functional health literacy to present poor glycaemic control (OR=4.76; 95% CI 1.36 to 16.63). In a fully adjusted linear regression model, lower functional health literacy (?=-0.42; p<0.001), longer diabetes duration (?=0.24; p=0.012) and lack of assistance for taking medications (?=0.23; p=0.014) were associated with higher levels of HbA1c. Contrary to our expectations, illiterate patients did not have poorer outcomes when compared with patients with adequate functional health literacy, raising the hypothesis that illiterate individuals are more likely to have their difficulties recognised and compensated. However, the small subsample of illiterate patients provided limited power to reject differences with small magnitude. CONCLUSIONS:Patients with inadequate functional health literacy presented with higher odds of poor glycaemic control. These findings reinforce the importance of addressing limited functional health literacy in clinical practice.