Challenges and needs of informal caregivers in elderly care: Qualitative research in four European countries, the TRACE project

Development and preliminary validation of a questionnaire on the care needs of family carers of older individuals with disabilities in China: a mixed methods study

BACKGROUND

Ensuring the wellness of older individuals with disabilities requires prioritising the care needs of their carers. However, current practice lacks validated tools to measure the needs of carers in home environments. Thus, this study aimed to create and test a questionnaire on the care needs of family carers of older people with disabilities in China.

METHODS

We used a standard development process to generate the questionnaire. The pilot testing included cognitive interviews to ensure interpretation as intended. Furthermore, we used a cross-sectional study method to conveniently select 640 Chinese family carers of older people with disabilities from August 1, 2022, to June 11, 2023, for face-to-face investigation. Exploratory factor analysis (EFA) aided in project reduction and factor estimation, with 30 participants undergoing retest evaluations every two weeks. Confirmatory factor analysis (CFA) assessed the model's structural validity, while internal consistency and retest reliability validated its accuracy.

RESULTS

These tests established the model: content validity, item analysis and EFA. Six factors extracted from the initial analysis explained 62.891% of the observation variance. CFA showed good model fit, and the questionnaire had good reliability and validity. The final questionnaire included 21 items focusing on six dimensions: care assistance (three items), care environment (three items), care information (three items), formal support (four items), care ability (six items) and self-development (two items).

CONCLUSION

The care needs questionnaire effectively evaluates the needs of family carers in their caring activities.

Community-dwelling older adults' perspectives on health risks: a qualitative study exploring anxieties, priorities, and expectations in ageing

BACKGROUND

With the conflict between the promise of ageing in health and longevity and the limited availability of health resources and social support, older adults in China inevitably experience anxieties surrounding health risks. This study aims to investigate how older adults perceive the health risks that come with getting older, explore the degree to which health risks affect older adults, and advocate for active engagement in practices for managing health risks.

METHODS

Using purposive sampling, three districts of Beijing (Xicheng District, Fengtai District, and Daxing District, respectively) were selected for the research. Qualitative semi-structured and in-depth interviews were conducted with 70 community-dwelling older adults who participated in the study. Data were extracted and analyzed based on a thematic framework approach.

RESULTS

Three main themes were identified: (i) the anxieties of older adults concerning health risks in ageing; (ii) the priorities of older adults for health risk management in ageing; (iii) the expectations of older adults for health risk management in ageing. The primary health concerns among older adults included disease incidence and function decline. It was found that basic health management emerged as a critical need for older adults to mitigate health risks. Moreover, it was observed that healthcare support for older adults from familial, institutional, and governmental levels exhibited varying degrees of inadequacy.

CONCLUSIONS

The primary source of anxieties among older adults regarding health risks predominantly stems from a perceived sense of health deprivation. It is often compounded by persistent barriers to primary care of priorities in managing health risks among older adults. In addition, the expectations of older adults for health risk management emphasize the necessity for integrated care approaches. Therefore, further research should give priority to the prevention and management of health risks, aim to reduce anxieties, provide integrated care to meet the primary needs and expectations of older adults, and ultimately strive toward the overarching goal of promoting health and longevity.

Assessing the needs of informal caregivers of patients with chronic non-communicable diseases: A systematic review of self-assessment tools

AIM

To synthesize self-administrated needs assessment tools of informal caregivers for patients with chronic non-communicable diseases (CNCDs), evaluate the quality of psychometric properties and identify main needs assessment themes.

DESIGN

Systematic review.

METHODS

Eight electronic databases both in English and Chinese were searched for. The psychometric properties of tools were evaluated according to the quality criteria for good psychometric properties developed by Terwee et al. Both the content analysis and thematic extraction methods were used. Needs assessment themes were categorized based on the 7-level Maslow's Hierarchy of Needs Theory.

RESULTS

A total of 17 tools were synthesized. Thirteen of them targeted informal caregivers of patients with cancer. The psychometric properties evaluated for most of these tools were content validity, internal consistency and construct validity. A total of 27 needs themes were identified and matched to six levels based on the 7-level Maslow's Hierarchy of Needs theory, besides the aesthetic needs level.

NO PATIENT OR PUBLIC CONTRIBUTION

No primary data are being collected.

The impact of informal caregivers' preparedness on short-term outcomes of heart failure patients with insufficient self-care

AIMS

Even though self-care is essential in the long-term management of heart failure (HF), it is often not performed adequately in HF populations. Mobilizing informal caregivers may be one way to help patients perform self-care, support individual needs, and maintain health. However, informal caregivers often face insufficient preparation for providing long-term care. This insufficient caregiver preparedness may lead to a decline in caregiver contributions and affect the outcomes of care in patients with HF. This study aimed to explore whether informal caregivers' preparedness is a predictor that influences short-term outcomes of HF patients; to analyse whether caregiver contribution to self-care of HF (CC-SCHF) plays a mediating role between informal caregivers' preparedness and HF short-term outcomes.

METHODS AND RESULTS

A prospective observational study was conducted in China. After controlling for covariates, higher levels of informal caregivers' preparedness were significantly associated with lower 3-month mortality [odds ratio (OR) = 0.919, 95% confidence interval (CI) = (0.855-0.988), P = 0.022] and 3-month readmission rate [OR = 0.883, 95% CI = (0.811-0.961), P = 0.004] and shorter length of hospital stay (β = -0.071, P < 0.001). The informal caregiver's preparedness was positively associated with CC-SCHF maintenance (r = 0.708, P < 0.01), CC-SCHF management (r = 0.431, P < 0.01), and CC-SCHF confidence (r = 0.671, P < 0.01). The CC-SCHF management was a mediator in the relationship between informal caregivers' preparedness and 3-month readmission rate [effect 95% CI = (-0.054 to -0.001)] and length of hospital stay [effect 95% CI = (-0.235 to -0.042)].

CONCLUSION

A higher level of informal caregivers' preparedness is associated with better short-term outcomes of HF patients with insufficient self-care.

The role of the caregiver in older patients with advanced prostate cancer: results from the ADHERE Prospective Study of the Meet-URO network

PURPOSE

To assess caregivers' characteristics and influence of the presence or absence of the caregiver on clinical outcomes of older (≥70 years) metastatic castration-resistant prostate cancer (mCRPC) patients treated with abiraterone (ABI) or enzalutamide (ENZ).

METHODS

Patients from the Meet-URO 5 ADHERE study were assessed with a 5-item caregiver evaluation questionnaire focusing on the presence, age, degree of kinship, working status and qualification of the caregiver. We investigated the association between the presence of a caregiver and the clinical characteristics and outcomes of enrolled patients.

RESULTS

No differences were found in the main clinical characteristics between patients with or without a caregiver, except for a lower median G8 score (p = 0.0453) in the caregiver group. A longer radiographic PFS (rPFS) was observed in the group without a caregiver, with a trend towards more prolonged overall survival (OS) in the same group.

CONCLUSION

Our work suggests a detrimental effect of caregivers in managing older mCRPC patients treated with ABI or ENZ, especially those identified as frail by the geriatric G8 screening score. Further work is needed to identify and address patients' vulnerability areas, which could have a detrimental effect on prognosis.

"She is My Work": Caregiving for Older Adults With Hypertension and Diabetes Mellitus

To explore the lived experiences of informal caregivers of older adults with hypertension and/or diabetes mellitus in Kumasi, Ghana. A qualitative research approach was used to conduct the study using informal caregivers of older adults with hypertension and/or diabetes mellitus at a teaching hospital in Ghana. In all, 20 participants were purposively sampled, interviewed, and data were analyzed using thematic analysis. Three main themes emerged: "Experience with care demands," "Coping with care demands," and "Motivation for caregiving." Older adults with hypertension and/or diabetes mellitus had needs that placed a burden on informal caregivers' work life, health, and social life. Informal caregivers of older adults with hypertension and/or diabetes mellitus are under strain. Caregiving is a difficult task, requiring a lot of time, effort, attention, and devotion. Nurses should plan the care of older adults with hypertension and/or diabetes mellitus in collaboration with their informal caregivers.

Supporting family care: a scoping app review

Background

Mobile applications (apps) may provide family caregivers of people with chronic diseases and conditions with access to support and good information. However, thorough understanding of how these apps meet the main needs and requirements of the users is currently lacking. The aim of this study was to review the currently available apps for family caregivers and evaluate their relevance to main domains of caregiving activities, caregivers’ personal needs, and caregivers’ groups found in previous research on family caregivers.

Methods

We conducted a scoping review on English-language and German-language apps for family caregivers on two major app stores: Google Play Store and iOS App Store. Apps were included if the main target group were family caregivers. Data were extracted from the app descriptions provided by the app producers in the app stores.

Results

The majority of the apps was designed to assist caregivers in their caregiving activities. Apps were rarely tailored to specific groups of family caregivers such as young carers and their needs. Further, apps addressing caregivers’ personal health, financial security, and work issues were scarce. Commercial apps dominated the market, often intermediating paid services or available for users of specific hardware. Public and non-profit organizations provided best-rated and free-of-charge apps but had a very limited range of services with focus on caregivers’ health and training.

Conclusions

Our results indicate that current apps for family caregivers do not distinguish specific groups of family caregivers, also they rarely address caregivers’ personal needs.

Exploring the Needs of Spousal, Adult Child, and Adult Sibling Informal Caregivers: A Mixed-Method Systematic Review

Informal caregivers (ICGs) provide care to their family or friends in case of an illness, disability, or frailty. The caregiving situation of informal caregivers may vary based on the relationship they have with the care recipient (CR), e.g., being a spouse or being an adult child. It might be that these different ICGs also have different needs. This study aims to explore and compare the needs of different groups of ICGs based on the relationship they have with their CR. We conducted a systematic review, performing a search in the databases PubMed, CINAHL, and PsycINFO. We included studies with qualitative, quantitative, or mixed-method study designs. We analyzed the data using the thematic analysis method. We included 22 articles (18 qualitative; 4 quantitative). The included articles reported the needs of ICGs taking care of a spouse (spousal ICGs), parent (adult child ICG), or sibling aged 18 years or above (adult sibling ICGs). We did not include other relationships due to the limited number of articles on these relationships. The most prominent needs reported by the spousal, adult child, and adult sibling ICGs were the need for information and need for support. The three groups differed in their needs as well. Adult child and adult sibling ICGs indicated a need to be acknowledged by the people around them for their role of carer, while they also needed to be seen as an individual having their own personal needs. Moreover, spousal ICGs indicated a unique need of redefining their role and relationship with their CR. Overall, the findings indicate that along with experiencing common needs, the investigated groups have unique needs as well. Knowing the needs of different groups of ICGs can help develop tailored solutions to improve the quality of life of the ICGs and their CR.

Systematic Review Registration: [www.crd.york.ac.uk/prospero/], identifier [CRD42020188560].

Applying the Dual Filial Piety Model in the United States: A Comparison of Filial Piety Between Asian Americans and Caucasian Americans

The definition and measurement of filial piety in existing research primarily focuses on the narrow conceptualizations of Asian filial piety, which would inflate cultural differences and undermine cultural universals in how people approach caring for their elderly parents. Employing the Dual Filial Piety Model (DFPM), this study aimed to examine the relationship between filial piety and attitude toward caring for elderly parents beyond the Asian context. In our study (N = 276), we found that reciprocal filial piety (RFP) does not differ across cultures while authoritarian filial piety (AFP) does. We also found that collectivism, rather than ethnicity, predicted RFP and AFP, which in turn predicted positive attitude toward caring for elderly parents. Our work demonstrates the cross-cultural applicability of the DFPM and highlights the universal and culture-specific aspects of filial piety.

Informal caregiver support needs and burden: a survey in Lithuania

INTRODUCTION

A demand for informal care exists worldwide. Lithuania presents an interesting case example where the need for the informal care is increasing, but relatively little research has been conducted documenting caregivers' experiences and needs.

OBJECTIVES

The main objective of this study was to investigate Lithuanian informal caregiver characteristics, support needs and burden. In addition, the impact of the COVID-19 on the caregiver's and care receiver's well-being was investigated.

METHODS

The study was conducted online between May and September 2020. Informal caregivers and individuals with informal caregiving experiences were invited to participate in the survey. The survey questionnaire comprised 38 multiple-choice items including participant demographic characteristics, availability of the support, support needs, well-being and the impact of the COVID-19 pandemic. In addition, caregiver burden was assessed with the 24-item Caregiver Burden Inventory (CBI).

RESULTS

A total of 226 individuals completed the survey. Most of the participants were women (87.6%). Almost half of the participants (48.7%) were not receiving any support, and a total of 73.9% expressed a need to receive more professional support. Participants were found to experience high burden on the CBI (M=50.21, SD=15.63). Women were found to be significantly more burdened than men (p=0.011). Even though many participants experienced psychological problems (55.8%), only 2.2% were receiving any psychological support. Finally, majority of the participants did not experience any changes in their own (63.7%) or the well-being of their care receiver (68.1%) due to the COVID-19 pandemic.

CONCLUSION

Most of the participants were identified as intensive caregivers experiencing a high burden. A majority did not experience changes in their well-being due to COVID-19. We propose several recommendations for increasing accessibility and availability of support for informal caregivers in Lithuania based on the study findings.

Global functionality and associated factors in the older adults followed by Home Care in Primary Health Care

Objective:

to analyze the association of global functionality with the main functional systems and the sociodemographic variables of older adults followed by Home Care in Primary Health Care.

Method:

a cross-sectional study with 124 older people developed through home interviews. Functionality was assessed by Basic Activities of Daily Living (Barthel) and Instrumental Activities of Daily Living (Lawton and Brody); the main functional systems were assessed using the Mini-Mental State Exam, by the Timed Up and Go test, by the Geriatric Depression Scale (15 items), and questionnaire with sociodemographic variables. Bivariate and multivariate analyses were applied (Poisson Regression).

Results:

46% of the older adults showed moderate/severe/total dependence for basic activities and instrumental activities had a median of 12. In the multivariate analysis, there was an association between moderate/severe/total dependence on basic activities with cognitive decline (p=0.021) and bedridden/wheelchair users (p=0.014). Regarding the dependence on instrumental activities, there was an association with age ≥80 years (p=0.006), single/divorced marital status (p=0.013), cognitive decline (p=0.001), bedridden/wheelchair (p=0.020), and Timed Up and Go ≥20 seconds (p=0.048).

Conclusion:

the decline in cognitive and mobility was associated with poor functionality in basic and instrumental activities. The findings highlight the need to monitor Home Care for these individuals and serve as guidelines for health actions.

Informal Care in the Context of Long-term Health Care for the Elderly in Slovenia: a Qualitative Study

Background

Slovenia is an aging society. Social security expenditures for the elderly are rising steadily, and the majority of Slovenians are firmly convinced that the state must provide elder care. This situation means that informal caregivers face many challenges and problems in their altruistic mission.

Objectives

To explore the experiences and feelings of informal caregivers and to provide an understanding of how informal caregivers support the elderly and what challenges and difficulties they face in Slovenian society.

Methods

The study is based on qualitative semi-structured interviews with 10 caregivers. In addition to descriptive statistics, we conducted a qualitative study using the qualitative content analysis method.

Results

We identified four themes among health caregivers’ experiences with challenges and problems in providing long-term health care for the elderly. Caregivers pointed out that they are mostly left to themselves and their altruistic mission of giving informal long-term care to their elderly relatives and friends. Systemic regulation of the national public health care system is the source of many problems.

Conclusion

Other social systems determine and limit the position of informal caregivers in Slovenia. This qualitative study should be understood as useful stepping-stone to future research and real improvement in this area.

Partnership between Primary Health and Social Care Services in the Long-Term Care of Older People with Dementia: A Vignette Study

Dementia is considered to be a significant cause of disability and dependency for older people worldwide and it raises difficulties in providing adequate formal and informal assistance. Research on the experience of long-term care (LTC)services for older people with dementia is scarce in Eastern European countries. This study aimed to understand the system of care for older people with dementia from the perspective of health and social care workers providing LTC services in Lithuania. A total of 72 primary health care and social care professionals from public and private institutions in Kaunas city participated in this study. One-to-one interviews were conducted with family physicians, community nurses, psychiatrists, psychiatric nurses, and social workers. A vignette situation of 2 fictitious patients with dementia and their informal caregiver was discussed during the interviews. Data were analyzed using thematic analysis by induction approach. The data revealed 2 main themes: LTC provision trajectory, and three-dimensional relationship perception in realization of LTC activities. LTC provision trajectory reflected activities performed as a response to the described situation embracing formal procedures for the endorsement of LTC needs as well as the range of LTC services. The three-dimensional perception of relationships in LTC services' implementation reflected the participants' personal approach toward LTC, relationship with different specialists, and the informal caregiver. Our study revealed the potential of complex measures that could be instrumental for the refinement of the caregiving process. First, a change in the additional care requirements endorsement logic is needed, shifting focus from medical diagnosis to functional abilities assessment. Second, to establish clear procedures for formal cooperation between the health and social care sectors in the trajectory of LTC service provision. Finally, to find an adequate balance between LTC and institutional care by creating a more comprehensive range of LTC services. A more consistent and coordinated delivery of services by both health and social care sectors seems to be an untapped resource for the improvement of the LTC potential.

Perspectives on Care for Late-Stage Parkinson's Disease

In the late stage of Parkinson's disease (PD), there is an increasing disease burden not only for the patients but also for their informal caregivers and the health and social services systems. The aim of this study was to explore experiences of late-stage PD patients' and their informal caregivers' satisfaction with care and support, in order to better understand how they perceive the treatment and care they receive. This qualitative substudy was part of the longitudinal European multicentre Care of Late Stage Parkinsonism (CLaSP) project. Individual semistructured interviews were conducted with patients (n = 11) and informal caregivers (n = 9) in Sweden. Data were analysed through the content analysis technique. The final analyses generated one main category: "We are trying to get by both with and without the formal care" and five subcategories: "Availability of health care is important for managing symptoms and everyday life"; "Dependence on others and scheduled days form everyday life"; "There is a wish to get adequate help when it is needed"; "Mixed feelings on future housing and respite care"; and "Family responsibility and loyalty for a functioning everyday life". Having regular contact with PD-specialised health care was perceived as important. Greater access to physiotherapy was wished for. Maintaining autonomy was perceived as important by patients, in both home health care and a future residential care setting. Responsibility and loyalty between spouses and support from children enabled everyday life to carry on at home, indicating a vulnerability for those without an informal caregiver. The results suggest that regular access to PD-specialised health care is important and that a specialised and multidisciplinary approach to the management of PD symptomatology is likely necessary. Non-PD-specialised staff in home health care and residential care facilities should regularly be given opportunities to obtain PD-specific education and information.

ICBT program for improving informal caregiver well-being: A qualitative study

BACKGROUND

Informal caregivers represent an important and vulnerable part of the society. They can experience negative psychological symptoms, such as depression and anxiety. Internet-based cognitive behavioural therapy (ICBT) is a promising psychological support option that could be effective in reducing informal caregiver burden as well as improving psychological well-being. Qualitative studies are valuable for gaining insights into participant experiences of using ICBT.

OBJECTIVE

The main aim of this study was to explore informal caregiver experiences and hence acceptability and feasibility of the transdiagnostic ICBT program aimed at reducing informal caregiver burden and increasing the quality of life.

METHODS

Following a strategic sampling procedure, 23 informal caregivers were recruited from previous randomized controlled trial for informal caregivers in Lithuania. Participants were interviewed over phone, using semi-structured interview questions. Interviews were analysed using a thematic analysis approach.

RESULTS

Four themes and a total of 10 sub-themes were generated: I A program as a means of change (Convenience and applicability of the format and materials; Ability to focus on own needs; Opportunity for communication), II Suggestions for the program (Including live support; Tailoring materials and format; Providing with more time and resources), III Driving personal and situational forces (Developing acceptance and adjustment over time; Being proactive and/or receiving support) and Hindering situational factors (Deterioration and unpredictability of the care-receivers health; Lacking external support and opportunities for respite).

CONCLUSIONS

Most of the informal caregivers were found to be satisfied with the program's format and materials as well as the communication with the therapist via a message function in the program. Some suggestions were made regarding implementation of the live support option. Also, suggestions regarding possibility for tailoring the program's content. Lastly, several personal and situational factors were identified as important in affecting informal caregiver well-being. We conclude that ICBT has potential in reducing informal caregiver burden and improving psychological health. Further research trials are warranted for evaluating both, the effectiveness and the feasibility of the program.

Qualitative research of informal caregivers' personal experiences caring for older adults with dementia in Lithuania

Background

In many communities around the world, informal caregivers of older adults with dementia represent an essential, yet often underappreciated, source of long-term care. The present study aimed to determine the personal experiences of such caregivers, which could be instrumental for developing means of improving the quality of care for both care receivers and their informal caregivers.

Methods

Five semi-structured focus-group discussions were held. The participants (n = 31) were all informal caregivers of older adults with dementia. The focus-group discussions were audio-recorded and transcribed verbatim. An inductive approach was used, and thematic data analysis was applied.

Results

Four thematic categories were identified: learning caregiving through personal experience; implications of caregiving on social wellbeing; caregivers’ contradictory emotions regarding care delivery; and addressing challenges regarding care provision.

Conclusions

This study revealed, among the informal caregivers, a variety of experiences, contradicting feelings, and problem-solving strategies relating to the care of older adults with mental disorders. Becoming an effective caregiver involves professional and psychological development. Developing caregiving skills, supportive environment and positive attitude can help facilitate providing care. Caregiving largely impacts the emotional, physical, and social wellbeing of the person; thus, comprehensive approaches are needed to prevent burnout and associated social disadvantages.

[Recommendations for the Diagnosis and Therapy of Psychotic Disorders in the Elderly]

Recommendations for the Diagnosis and Therapy of Psychotic Disorders in the Elderly Abstract. Psychotic disorders in the elderly cover a wide range of causes and manifestations. They often occur as part of a depression, dementia, substance abuse or delirium. While psychosis can occur with a first manifestation in advanced age, many patients with chronic psychotic disorders reach a high age. Many elderly individuals are also affected by cognitive impairment and somatic conditions, making a third-party history most relevant. The associated changes in life and the complexity of the individual situation needs to be integrated into the diagnosis and treatment. The presented recommendations have been developed under the lead of the Swiss Society of Old Age Psychiatry (SGAP) in collaboration with the Swiss Association of Nurses (SBK) and the subcommittees for gerontological and psychiatric nursing of the association of nursing science (VFP) as well as further professional societies. We aim to make current knowledge concerning diagnosis and treatment available to the interprofessional teams working in in- and outpatients' settings.

Unmet needs of informal carers of the oldest old in Portugal

Oldest-old individuals are a growing segment of the population that faces several challenges in terms of care demands. Informal caregivers experience more or less challenges, namely depending on the support they can access. The present study explores the unmet needs of a sample of informal caregivers of community-dwelling older adults aged 80+ and analyses the association of such needs with sociodemographic information, care-giving context (e.g., length of care),and health characteristics of the caregivers and care receivers (e.g., cognitive status and functionality). We recruited 175 care-giving dyads from the North of Portugal. Descriptive statistics summarised the sample's characteristics. Informal caregivers were mainly women with a mean age of 60.6 years (SD = 9.8). Care receivers' mean age was 88.7 years (SD = 5.6) and were functionally dependent (9.3 points [SD = 7.0] and 27.0 points [SD = 3.5] for Basic and Instrumental Activities of Daily Living, respectively). A thematic analysis of an open-ended question on unmet needs was performed, revealing the presence of unmet needs. The most relevant ones (financial support, caregiver support, primary care/medical specialities, and labour regulation) were further analysed, concerning the care-giving dyad's using Independent Student's t test or Mann-Whitney U Tests, and Chi-squared test or Fisher's Exact test depending on the variable. The most frequent unmet needs were associated with the caregiver's age, care receivers' kinship, number of care-giving hours, the caregiver's gender, professional status, the caregiver strain and medicines intake. Findings suggest the need for establishing policies that ensure adequate sustainability of the provision of informal care that takes into account the needs of care-giving dyads in the planning process.

To Develop Health Education Tools for Nasogastric Tube Home Caring Through Participatory Action Research

Medical institutions provide guidance on caring skills for home caregivers. Oral teaching is combined with graphical tools in a method that has been proved to be an effective way of quickly mastering home caring skills and promotes effective learning for home caregivers. The graphic design and operation contents of this method are constantly revised through interviews and observations, and by carrying out home care application graphics it forms a spiral structure of Plan-Do-Study-Act (PDSA) participatory action research (PAR). In the three cycles of the operation of PDSA PAR, the designers accurately create graphics of the caring details based on the nurses' demonstrations and develop health education tools that are suitable to provide continuous assistance and services in real-life situations. PAR combined with PDSA, in each of the three cycles of the operation-design personnel, medical personnel and home caregiver personnel, respectively-as the lead roles, guide the planning decisions for PAR. This study is a reference for the improvement and development of medical graphics for health education tools to improve accuracy.