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Journal of Aging Research
Volume 2014, Article ID 194635, 10 pages
http://dx.doi.org/10.1155/2014/194635
Research Article

Is the Cloze Procedure Appropriate to Evaluate Health Literacy in Older Individuals? Age Effects in the Test of Functional Health Literacy in Adults

1Department of Psychiatry and Behavioral Medicine, Nova Southeastern University, Fort Lauderdale, FL 33314, USA
2Center for Psychological Studies, Nova Southeastern University, Fort Lauderdale, FL 33314, USA
3Nell Hodgson Woodruff School of Nursing, Emory University, Atlanta, GA 30322, USA

Received 30 May 2014; Revised 26 August 2014; Accepted 26 August 2014; Published 11 September 2014

Academic Editor: F. R. Ferraro

Copyright © 2014 Raymond L. Ownby et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Health literacy has received increasing attention because of its importance for older individuals’ health, as studies have shown a close relation between older individuals’ health literacy and their health. Research also suggests that older individuals have low levels of health literacy, but this finding is variable and may depend on which health literacy test is used. Older individuals assessed with the Test of Functional Health Literacy (TOFHLA) score lower than younger individuals, but a previous study suggested that this may result from age-related differential item functioning (DIF) on the TOFHLA. The study reported here assessed age-related DIF in a sample of community-dwelling volunteers. Twenty-two percent of items were differentially more difficult for older individuals independent of their overall ability, and when these items were eliminated from the total score, age differences were no longer found. Performance on a working memory task predicted older but not younger individuals’ performance on the age-related items. At least part of older individuals’ apparent deficits in health literacy when assessed by the TOFHLA may be related to DIF on its items. The TOFHLA, and any measure that employs the cloze procedure to evaluate reading comprehension, should be used cautiously in older individuals.