Functional health literacy from the perspective of gerontological nursing: an integrative literature review

Abstracts

Objective:

To perform an integrative review of literature on functional health literacy from the perspective of Gerontological Nursing.

Method:

a study was made of the MEDLINE, PubMed, LILACS, IBECS, BDENF and CidSaúde databases, and studies published in Brazilian and international publications during the period of 2005-2014 were included. The studies were selected by main subject, such as education of patient, health literacy, schooling, the elderly, health education and self-care.

Results:

58 studies were found, of which 33 were pre-selected, but only 17 composed the final sample, 15 of which were international and two of which were Brazilian.

Conclusions:

the results indicate an integration of knowledge of the assessment of functional health literacy among the elderly. Inadequate literacy was evident, indicating an excessive impact on health management, especially among those with chronic disease. Additionally, inadequate understanding of times and doses when taking medicine highlights that new strategies can be designed to bring empowerment and greater control to health.

Health Literacy; Health Education; Elderly; Nursing

Objetivo:

Realizar uma revisão integrativa da literatura sobre o letramento funcional em saúde, na perspectiva da produção da Enfermagem Gerontológica.

Método:

Foram pesquisadas as bases de dados MEDLINE, PubMed, LILACS, IBECS, BDENF e CidSaúde, incluídos estudos publicados em periódicos nacionais e internacionais, no período de 2005-2014. Os estudos foram selecionados pelo assunto principal, como educação de pacientes, alfabetização em saúde, escolaridade, idoso, educação em saúde e autocuidado.

Resultados:

Foram encontrados 58 estudos, pré-selecionados 33, porém somente 17 compuseram a amostra final, sendo 15 internacionais e dois nacionais.

Conclusões:

Os resultados apontam a integração de saberes sobre a avaliação do letramento funcional em saúde de idosos. O inadequado letramento foi evidente, demostrando impactar sobremaneira a gestão em saúde, principalmente aqueles com doença crônica de longa duração, além da compreensão inadequada de horários e dosagens de medicamentos, destacando que novas estratégias podem ser pensadas para o empoderamento e melhor controle da saúde.

Alfabetização em Saúde; Educação em Saúde; Idoso; Enfermagem

INTRODUCTION

Functional Health Literacy (FHL) involves the "degree to which individuals are able to obtain, process and understand the basic health services and information required in order to make adequate health decisions".^{1 , 2} FLH has also been correlated with the ability of an individual to understand aspects of self-care and the health system, prior to making these decisions.³ Health Literacy (HL) is a descriptor that involves the study of the influence of literacy on the context of health.⁴ This concept was translated to Portuguese as health literacy and, in the mid- 1980s, with the appearance of this new field of study, the words letramento (literacy), illettrisme and literacia were used in Brazil, France and Portugal, respectively.⁴ However, conceptually, there is still a certain amount of debate surrounding the applicability of health literacy in social practices.^{5 , 6}

FHL is cited in a report issued by the Ad Hoc Committee on Health Literacy for the Council on Scientific Affairs, from the American Medical Association (AMA),⁷ as an expansion of HL, implying the operationalization (practical) of literacy in the concept itself. ⁸ The two terms are used interchangeably.⁹

The term Functional Health Literacy is used in the present study as it is used in Brazilian studies identified in the literature of this area (health).^{4 , 8} Studies have reported that FHL is a relatively new concept in the area of health promotion.^{9 , 10} It is also considered an emerging field in the areas of education and health promotion.⁴ FHL has attracted the interest of researchers, health professionals and public policy creators, due to its complex, multi-dimensional and interdisciplinary nature, as well as the impact that poor literacy can exert on an individual, their family, the community and the health system.^{8 , 10 - 12}

FHL is a functional condition that involves multiple dimensions, which are interwoven into a complex network of health determinants, including: sociodemographic characteristics (occupation, income, social support, culture and language); cognitive abilities (cognition and memory); and physical abilities (age, vision, audition and verbal fluency). These determinants interact among each other, although it is important to consider macro aspects from each country, such as the educational system, the health system, and the cultural and social aspects that transversely permeate these determinants. Individuals with less education, lower salaries and the elderly may be more vulnerable. ^{13 , 14}

As well as the determinants that can affect FHL, a conceptual integrated model was recently proposed,¹⁵ which is capable of capturing the main dimensions of the already existing models. This model includes other factors, such as access to health information, understanding and awareness of this information, and the ability to assess and make adequate use of the same, which are considered essential to the development of the decision-making abilities that will prevent or maintain the health status of the individual.

In the perspective of this integrated model, ¹⁵ the process is continuous, regardless of whether the person is already sick, is at risk of getting sick, or is participating in a prevention system/health promotion project in their community, workplace, educational institution, among others.¹⁶

FHL initially attracted interest from researchers in developed countries, such as the USA, in 2003, when the National Assessment of Adult Literacy (NAAL) was carried out. This survey assessed 18,000 people and confirmed that 36% exhibited limited FHL,⁴ which was also correlated with a lower quality of health and greater costs, both at an individual and collective level.^{16 , 17}

In Brazil, this subject has not been studied in great detail and requires greater investment in order to strengthen and improve healthcare strategies and practices.¹⁸ For comparative purposes, 60% of the population of Canada exhibit inadequate FHL, and this figure rises to 88% among the elderly population.¹⁹

The World Health Organization (WHO), through the Commission on Social Determinants of Health, identified FHL as one of the social determinants of health, since it can contribute to an improvement in the individual's ability to access, understand, assess and communicate information in a manner that will improve their own health, as well as that of their family and community.¹³

Several authors have stated that inadequate FHL seems to be more common among the elderly and those with lower incomes. The lives of the elderly can be significantly affected by FHL, particularly older elderly people and those with chronic health conditions, who are more likely to require healthcare services and complex therapeutic procedures.^{7 , 20}

The concept of FHL has become more significant and has started to generate more specific debates, particularly about its use in assessments of individuals with chronic diseases such as cancer and diabetes. It has also become more important in the areas of Odontology and Nutrition, highlighting correlations with health.⁸

There is an expectation that this concept, which is based on the preexisting competence of individuals in the health environment and the results of its application, could drive future projects/interventions to instruct the elderly in relation to preventative measures and health promotion.¹⁸

This segment concerned itself with investigating and divulging the subject of FHL, questioning the trends of scientific production in the area of gerontological nursing. Therefore, the aim of the present study was to perform an integrative literature review on the theme of functional health literacy from the perspective of gerontological nursing.

METHODS

This exploratory study involved an integrative literature review of the theme of FHL, with a focus on gerontological nursing. An integrative review is a specific method that summarizes previous empirical or theoretical literature in order to provide a clearer understanding of a particular phenomenon.²¹ The aim of this research method is to analyze previously constructed knowledge on a determined theme in published articles. Integrative literature reviews also enable the synthesis of several previously published studies, generating new knowledge based on the results of previous research.^{21 , 22}

The following Inclusion criteria were applied: studies published in national and international journals between 2005 and 2014; in which FHL was the main focus of studies of the scientific production of gerontological nursing; or that stressed the importance of the role of the nurse in the assessment of FHL. The following studies were excluded: studies duplicated in one of more database; unpublished nursing theses and dissertations; and studies conducted with people aged under 60 years.

The literature review was performed based on the terms health literacy and elderly, as described in the Virtual Health/Nursing Library (BVS). The studies were located in the MEDLINE, PubMed, LILACS, IBECS, BDENF and CidSaúde databases, based on the following main subjects: education of patients; health literacy; education; elderly; health education; health promotion and self-care. The studies selected originated in North America, Europe, Asia, South America and the Caribbean. The languages included were English, Spanish and Portuguese.

RESULTS

Based on these search criteria, 58 studies were found in the databases, of which 33 were pre-selected. However, only 17 were structured along the lines of a final sample for analysis and discussion. The results of these 17 studies are displayed in Figure 1.

Figure 1
Synopsis of the results from studies found on the theme of Functional Health Literacy (FHL). 2014.

Based on the literature review of this theme, respecting the abovementioned inclusion/exclusion criteria and time period (2005-2014), it is clear that studies related to FHL are scare in Latin America, including Brazil, in terms of the area of gerontological nursing. Of the 17 studies analyzed, 15 were carried out in English speaking countries,^{10 , 23 - 27 , 29 - 32 , 34 - 37 , 45 - 46} with two in Portuguese, both of which were conducted by nurses.^{18 , 28}

Concerning the specific theoretical body of nursing and the assessment perspective of FHL, nursing care is significant, since it involves possible Nursing Diagnoses (ND). These can be used in situations involving a risk to the health of an elderly individual due to inadequate FHL, such as in the case of the control/lack of control of diseases of the endocrine system or diabetes (Figure 2).⁴⁷

Figure 2
Nursing diagnoses, risk factors or factors associated with low levels of FHL among people with diseases of the endocrine system - diabetes. 2014. Source: Silva ERR, Lucena AF et al. (2011, p.167).⁴⁷

The results displayed refer to analysis of the main focus identified in the studies selected, stressing the impact of low FHL on the management of chronic disease and health, particularly in relation to medication schedules and dosages. They also reveal the assessment of FHL from the perspective of the scientific production of gerontological nursing.

It is important to stress that this theme is interwoven with other themes, particularly in relation to health promotion, communication, health information and the participation of the nurse in this network, all of which establish the complexity of FHL.¹⁵

DISCUSSION

Based on the results of this literature review, functional health literacy (FHL) emerged as a topic of great international concern in most of the studies.^{10 , 23 - 27 , 29 - 36 , 45 , 46} Since 2005, nurses have identified this theme as a challenge to effective self-care.

These studies^{10 , 23 - 31 , 33 - 36 , 46} also emphasized that inadequate FHL is highly prevalent among the elderly, perhaps reflecting a weakness in the health system, in which older individuals are required to play a more active role in the management of their own health. Strategies of health literacy could be given more attention by healthcare providers.

Another study indicated that more than 50% of all adults and elderly individuals experience difficulties when attempting to understand instructions related to taking their medication or using their health plan, and are consequently correlated with a greater risk of hospitalization and a greater use of resources. ³⁸

FHL is also referred to as one of the factors that affects competence (knowledge) in reading comprehension and numeracy, or an association of the two. A study conducted in the USA with 383 adults suffering from type 2 diabetes correlated low levels of numerical literacy with less effective control of glycemia.³⁹ This result may have been due to the fact that FHL is correlated with the ability to read and understand the information contained on bottles of medicine, cards and appointment slips, as well as other materials associated with health control. ^{11 , 40 , 41}

A study involving adults and elderly individuals (n=95) with heart failure reported that FHL was inadequate in 42% of the participants and that this percentage worsened with advancing age and a low level of educaiton.²⁹ Education levels have been discussed as a predictor for the ability of an individual to understand and apply health information adequately. A study conducted in the Northeast of Brazil also assessed FHL and confirmed that the education level of the participants was low, particularly among women.¹¹

Similarly, a study conducted in Curitiba-PR in 2011 assessed 72 elderly individuals in relation to FHL in old age, noting that 71.9% of the participants had only attended elementary school. Of these, 23.6% did not even finish this level. When asked if they liked to read, 37.2% gave disjointed or insufficient responses, indicating that they had not understood the question and may exhibit restricted literacy levels.⁴²

The same authors also reported that this condition depends on a complex system that involves an understanding of what is around us, as well as the effective use of writing. These factors are essential so that the elderly individual can feel at ease in our society, which is basically mediated by reading and writing. However, this study did not use any standardized tests to assess the literacy of the elderly and was restricted to a general comprehension of reading and writing, which was not specific to the area of health.⁴²

Participants with adequate literacy exhibited improved confidence in relation to self-care. Readmission rates were also higher among those with inadequate or marginal literacy.^{29 , 43}

In a study conducted in the USA with adults and elderly individuals aged 65 years or more (n=3260), researchers found that 33.9% exhibited inadequate or marginal FHL. The authors paid special attention to education levels and cognitive impairment, which were correlated with low FHL and declined with advancing age. In the opinion of the authors, these findings could affect the results.²⁰

In this context, inadequate FHL can have several consequences on the health of the elderly, particularly when it is not addressed in projects/interventions. Studies have highlighted the following consequences: increases in healthcare costs; reduced or false knowledge about diseases and treatment protocols; lower competence in terms of health management; less capability to care for people with chronic conditions; medication errors; incapacity to deal with success in healthcare systems and inadequate health services.^{37 , 40 , 43}

A number of theoretical models for FHL, such as that proposed by Mancuso,³⁷ argue that is does not occur statically but is the result of constant movement and has evolved over a long period of time, encompassing attributes such as capacity, comprehension and communication. These are preceded by competencies (knowledge). People with a certain level of health literacy or education have the potential to influence other individuals and society as a whole.

In order to better understand this complex concept, Nutebeam¹⁴ proposed dividing the field of literacy into three types: basic or functional literacy (which requires the basic skills of reading and writing); communicative/interactive literacy (referring to cognitive abilities and more advanced literacy) and critical literacy (requiring more advanced cognitive and social abilities, which can be applied critically in different situations in life).

When referring to FHL, several studies allude to these attributes as a condition for health promotion and suggest that low literacy levels could favor the appearance of chronic diseases. ⁴⁴

A study in the USA monitored a group of elderly individuals for close to six years and reported that those with inadequate FHL exhibited less knowledge about health, worse self-management of chronic diseases, less use of preventative services and consequently, worse health conditions. The authors also indicated that these individuals were at a greater risk of death due to cardiovascular disease, when compared with other diseases. ⁴⁵

Concerning conceptual models of FHL, Sorensen et al.,¹⁵ based on a systematic literature review, analyzed 12 concepts and four dimensions of FHL in the domains of healthcare, disease prevention and health promotion. The authors proposed a model integrating knowledge from the areas of medicine and public health, stressing that this new conceptual model could lead to the development and validation of tools. In addition, this up-to-date integrated conceptual model of FHL was constructed from the perspective of the individual throughout his or her life, based on an individual and population context. The aim of this model was to empower individuals to improve their health conditions.

In this context, intervention measures associated with the following themes can have an impact: attitudes and knowledge related to health; motivation; behavior intentions; and personal competencies. Other factors include social influence (participation, training the community, social standards and public opinion), health polices and organizational practices (political declarations, legislation, regulations and the allocation of resources).³⁷ These factors are correlated with the field of the educational system, social mobilization and the defense of groups (not only the individual), thereby creating a true "web of interactions".³⁷

Concerning the participation of gerontological nursing in the assessment of FHL, as well as the perspective of using the resources of FHL, it was clear from the studies assessed that nurses play an important role in the communication and health education process of the elderly, with several authors stressing that nurses should spare no effort in their attempts to educate the elderly during their daily routine.^{31 , 35 , 48} It was also notable that most of the studies analyzed in this review used the concept elaborated and adopted by the Institute of Medicine (IOM).²

In Brazil, Nutrition, Odontology, Medicine and Education professionals are already investing in the creation of technology that can assist them during assessments of FHL, including the Health Literacy Assessment Test (TALES), which will help in correlations between FHL and different clinical outcomes. ¹⁷

Furthermore, researchers in the area of gerontological nursing have also begun to invest in this issue, following the lead of other countries such as the USA, Canada, England and France, who already use assessment tools for both numerical and textual comprehension. Nurses in Brazil, especially in the South of the country, have contributed by translating and validating Canadian instruments for use with elderly individuals in Brazil.²⁸

Concerning the different methods of assessing FHL, most of the studies analyzed in this review used the short version of the Test of Functional Health Literacy in Adults (S-TOFHLA), which assesses the FHL of an individual, regardless of their level of education. This test also classifies FHL as inadequate, marginal or adequate, based on the score obtained in the textual and numerical comprehension questions. These questions involve a situation that is common for individuals who use these healthcare services. The test exists in English and Spanish and was validated in Brazil in 2009.⁴

The literature also refers to the Rapid Estimate of Adult Literacy Medicine (REALM). This was the first tool used in the USA to assess FHL, although it was only applied in one of the studies analyzed in this reveiw.³³ This test was developed by Davis et al.⁴⁸ and involves word recognition and a questionnaire containing 125 terms. There is also a reduced version, with 66 words, involving the recognition of different parts of the body and different types of disease. Both versions are limited in that they only assess the ability of reading.¹⁷ This test has not been validated for use in Brazil and none of the studies carried out by Brazilian nurses made use of this assessment tool.

It was also notable in this review that FHL is not only inherent to the health of an individual, but involves other dimensions in the context of our lives. This dimensionality can be noted in the study conducted with caregivers (of the elderly) who exhibited inadequate FHL.²⁹ In other words, their competence and abilities were limited in relation to medical guidance and medication schedules and dosages for the elderly. This highlights how important it is for nurses to develop their ability to assess FHL and to employ health education strategies with the elderly, as well as with their caregivers and families. As a consequence, these individuals will be empowered in terms of self-care, and will learn to see FHL as a process that is established is several stages, as demonstrated in the model created by Sorensen et al.¹⁵

In addition, this review also addressed the different strategies that nurses can use in their daily activities to prove the impact of FHL on the quality of health assistance and above all, basic healthcare services.¹⁸

The main limitation of this literature review was the scarcity of scientific production on FHL among the elderly population of Brazil. This limitation may have hindered a more in-depth discussion of FHL in this population, although it is hoped that these results will encourage future studies on this theme.

FINAL CONSIDERATIONS

Based on the results found in the studies selected, assessments of functional health literacy are important for health promotion.

The conceptual approach comes from public health and integrates several attributes, such as competencies, comprehension, information and communication, which are essential for individuals who care for themselves and for caregivers who work with the elderly population, and can reflect the quality of health care.

There is a notable lack of studies in Brazilian literature on the scientific production of gerontological nursing. These results indicate the integration of knowledge about the assessment of functional health literacy among elderly individuals with chronic diseases, among whom a low/inadequate FHL was evident. This greatly impacts their health management and leads to the inadequate comprehension of medication dosages and schedules. These results could stimulate a search for new education and information strategies.

According to the literature identified as assessments of FHL, there are a number of possibilities that could be explored in the Brazilian nursing area, including the use of light and inexpensive healthcare technology, which instigates new productions and could improve health education resources, nursing assistance methods and the training of human resources. These would lead to an empowerment of the elderly population, as well as their families and the community as a whole, in terms of being able to control their health more adequately.

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Publication Dates

• Publication in this collection
  July-Sep 2015

History

• Received
  25 Apr 2014
• Reviewed
  11 Jan 2015
• Accepted
  19 Mar 2015